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CONSTRUCTION M ASTER PRO
®
User s Guide
For Models:
4065 v3.1 Construction Master Pro
4080 v3.1 Construction Master Pro Trig
44080 v3.1 Construction Master Pro Desktop
CONSTRUCTION MASTER® PRO V3.1 USER’S GUIDE
This User’s Guide helps you solve common construction math and
material estimation problems using the latest Construction Master Pro
calculators—three of the most powerful feet-inch-fraction calculators
to date:
The Construction Master Pro III Series —
1. Construction Master Pro (#4065 v3.1)
2. Construction Master Pro Trig (#4080 v3.1)
3. Construction Master Pro Desktop (#44080 v3.1)
IMPORTANT: The Construction Master Pro Trig does not have
Block, Concrete Footing, Drywall, or Length, Width, and Height
functions. These keys are replaced with standard trigonometric keys.
INTRODUCTION
The Construction Master Pro line includes the most advanced feetinch-fraction calculators designed specifically for building pro’s!
The Pro calculators handle practically any problem involving measurements and can be used to save time, prevent errors, and accurately perform common building projects such as: estimating concrete volume, squaring-up foundations, framing roofs, ordering lumber, building stairs, walls, laying driveways, carpet or floor covering,
figuring precise angle calculations, or simply working in feet-inchfractions or decimal feet!
Your Calculator Helps You Solve:
• Dimensional Math Problems
• Conversions Between Feet-Inch-Fractions, Decimal Feet,
Decimal Inches, and Yards
• Imperial/Metric Conversions
• Problems Involving All Common Fractions — 1/2” to 1/64”!
• Area/Volume Calculations
• Board Feet/Lumber Calculations
• Circle Calculations
• Column/Cone Area and Volume
• Compound Miter Cuts for Crown Moulding
• Material Estimations and Costs
• Polygons
• Rake-Walls
• Right Angle/Triangle Solutions
• Roofing Materials
• Stair Layout (Risers/Treads)
• Studs
• Weight/Volume Conversions
Pro and Desktop Models (NOT AVAILABLE ON TRIG MODEL #4080)
Also Solve:
• Block/Bricks, Concrete Footings and Drywall
• Instant Square-up, Perimeter, Wall Area, Room Area and
Volume
TABLE OF CONTENTS
GETTING STARTED..........................................................................1
KEY DEFINITIONS .........................................................................1
Basic Operation Keys ..................................................................1
Convert Ç Key – Unit Conversions and Second Functions ....1
Memory and Storage Functions...................................................2
Recall ® Key.............................................................................3
Dimensional Measurement Unit Keys..........................................3
Area and Volume Keys (NOT AVAILABLE ON TRIG MODEL #4080)......4
Weight Keys .................................................................................5
Construction Project Keys and Functions....................................6
Block/Brick Function (NOT AVAILABLE ON TRIG MODEL #4080)..........6
Circular/Arc Function Keys ..........................................................7
Column/Cone Function ................................................................8
Compound Miter/Crown Moulding Keys ......................................8
Drywall Function (NOT AVAILABLE ON TRIG MODEL #4080)................9
Footing Function (NOT AVAILABLE ON TRIG MODEL #4080)................9
Polygon Function .........................................................................9
Right Triangle/Roof Framing Keys.............................................10
Hip/Valley and Jack Rafter Keys ................................................11
Rake-Wall Function....................................................................13
Roof Materials/Covering Function..............................................14
Stair Key ....................................................................................14
Studs Function ...........................................................................16
Trigonometric Keys (TRIG #4080 AND DESKTOP #44080
MODELS ONLY) ...........................................................................16
ENTERING DIMENSIONS ............................................................18
Entering Linear Dimensions.......................................................18
Entering Square/Cubic Dimensions ...........................................18
SETTING FRACTIONAL RESOLUTION.......................................20
Setting Fraction Resolution – Using the Preference
Setting Mode ...........................................................................20
Converting a Fractional Value to a Different Resolution............21
CONVERSIONS (LINEAR, AREA, VOLUME) ..............................22
Linear Conversions ....................................................................22
Converting Feet-Inch-Fractions to Decimal Feet .......................22
Converting Decimal Feet to Feet-Inch-Fractions .......................22
Converting Fractional Inches to Decimal Inches .......................23
Converting Decimal Inches to Fractional Inches .......................23
Square Conversions ..................................................................23
Cubic Conversions.....................................................................23
PERFORMING BASIC MATH WITH DIMENSIONS .....................24
Adding Dimensions ....................................................................24
Subtracting Dimensions .............................................................24
Multiplying Dimensions ..............................................................24
Dividing Dimensions ..................................................................24
Percentage Calculations ............................................................25
MEMORY OPERATION ................................................................25
Basic Cumulative Memory (M+).................................................26
Permanent Storage Registers (M1 and M2)..............................26
PAPERLESS TAPE OPERATION .................................................27
EXAMPLES – USING THE CONSTRUCTION MASTER PRO......29
LINEAR MEASUREMENT EXAMPLES ........................................29
Adding Linear Measurements ....................................................29
Cutting Boards ...........................................................................29
Window Measurement ...............................................................30
Calculating the Center Point ......................................................30
AREA CALCULATIONS ................................................................31
Square Area (x 2) ........................................................................31
Area of a Rectangular Room (LxW) ..........................................31
Using Multi-Function W Key to Find Area, Square-up and
Perimeter (NOT AVAILABLE ON TRIG MODEL #4080)......................31
VOLUME CALCULATIONS...........................................................32
Rectangular Containers (LxWxH) ..............................................32
Using the Multi-Function h Key to Find Volume,
Wall Area and Room Area
(NOT AVAILABLE ON TRIG MODEL #4080) ......................................32
Volume of a Cylinder..................................................................33
Volume of a Cone ......................................................................33
WEIGHT/VOLUME CONVERSIONS ............................................34
Weight Conversions ...................................................................34
Weight per Volume/Volume Conversions...................................34
BLOCKS/BRICKS (NOT AVAILABLE ON TRIG MODEL #4080)...............35
Number of Blocks, Based on Entered Length and Height ........35
Number of Blocks, Based on Entered Area ...............................35
Number of Blocks, Based on Calculated Perimeter ..................36
Number of Blocks, Based on Entered Length ...........................36
Number of “Face” Bricks ...........................................................37
Number of “Paver” Bricks .........................................................37
BOARD FEET – LUMBER ESTIMATION .....................................38
Total Board Feet – With Dollar Cost ..........................................38
Number of Board Feet Based on Entered Volume ....................38
CIRCLE AND ARC CALCULATIONS............................................39
Circumference and Area of a Circle...........................................39
Arc Length – Degree and Diameter Known ...............................39
Arc Length – Chord Length and Segment Rise Known.............39
Arc Calculations – Arc Length and Diameter Known ................40
ARCHED SEGMENT WALLS .......................................................41
Arched Segment Walls – Arched Windows (No Base) ..............41
Arched Segment Walls – Arched Windows (With Base) ...........42
Arched Segment Walls – Chord Length and Segment Height
Known .....................................................................................43
COMPOUND MITER.....................................................................45
Compound Miter Cuts ................................................................45
CONCRETE/PAVING ....................................................................46
Volume of Concrete for a Driveway ...........................................46
Concrete Columns .....................................................................47
Complex Concrete Volume ........................................................48
Polygon, Finding Angles Based on Entered Radius and
Number of Sides .....................................................................49
Concrete Footings (NOT AVAILABLE ON TRIG MODEL #4080) ...........50
Squaring-up a Foundation .........................................................51
DRYWALL (NOT AVAILABLE ON TRIG MODEL #4080)...........................52
Number of Drywall Sheets for a Given Area..............................52
Number of Drywall Sheets for a Given Length ..........................52
GRADE/SLOPE.............................................................................53
Back-Fill on a Slope – Percent of Grade Known .......................53
RIGHT TRIANGLE AND ROOF FRAMING EXAMPLES ..............54
Roof Framing Definitions ...........................................................55
Degree of Pitch ..........................................................................57
Percent Grade............................................................................57
Pitch Ratio or Slope ...................................................................57
Common Rafter Length..............................................................58
Common Rafter Length – Pitch Unknown .................................58
Angle and Diagonal (Hypotenuse).............................................59
Rise ............................................................................................59
Rise and Diagonal......................................................................59
Sheathing Cut ............................................................................60
Regular Hip/Valley and Jack Rafters ........................................60
Jack Rafters – Using Other Than 16-Inch On-Center
Spacing ..................................................................................61
Irregular Hip/Valley and Jack Rafters – Descending, with
On-center Spacing Maintained ...............................................62
Irregular Hip/Valley and Jack Rafters – Ascending, with
Jacks Mating at Hip/Valley......................................................64
Rake-Wall – No Base.................................................................66
Rake-Wall – With Base ..............................................................67
ROOFING MATERIALS ................................................................68
Roof Covering – Entering Pitch, Length and Width ..................68
Roof Covering – Entering Rise, Run (No Pitch) and Area.........69
STAIR LAYOUT EXAMPLES ........................................................70
Stair Layout Definitions ..............................................................70
Stairs – Given Only Floor-to-Floor Rise .....................................72
Stairs – Given Only the Run ......................................................74
Stairs – Given Rise and Run .....................................................75
Stairs – Given Rise and Run, Using “Riser Limited” Function
for Code Restrictions ..............................................................76
Baluster Spacing........................................................................77
STUDS ..........................................................................................78
BASIC D:M:S AND TRIGONOMETRY EXAMPLES .....................78
Converting Degrees:Minutes:Seconds ......................................78
Time Calculations Using D:M:S .................................................78
TRIGONOMETRIC FUNCTIONS..................................................79
Converting Percent Grade to D:M:S ..........................................80
Converting Tangent/Pitch to Angle.............................................80
Converting Roof Angle in Degrees to Pitch in Inches................80
Angle – Rise and Hypotenuse Known .......................................81
APPENDIX A – DEFAULT SETTINGS ............................................82
APPENDIX B – PREFERENCE SETTINGS ....................................83
How to Set Preferences.............................................................86
Accessing Preference Settings ..................................................86
APPENDIX C – CARE INSTRUCTIONS .........................................89
APPENDIX D – IMPORTANT NOTES FOR OWNERS OF
PREVIOUS CONSTRUCTION MASTERS ..................................90
APPENDIX E – ACCURACY/ERRORS, AUTO SHUT-OFF,
BATTERIES, RESET ....................................................................91
ACCURACY/ERRORS..................................................................91
Error Codes................................................................................91
AUTO SHUT-OFF .........................................................................91
BATTERIES...................................................................................92
Replacing the Battery(ies)..........................................................92
Battery Replacement Instructions ..............................................92
RESET ..........................................................................................92
APPENDIX F – AREA/VOLUME FORMULAS ................................93
AREA FORMULAS........................................................................93
SURFACE AREA/VOLUME FORMULAS .....................................94
REPAIR AND RETURN ...................................................................95
WARRANTY.....................................................................................96
INDEX...............................................................................................99
GETTING STARTED
KEY DEFINITIONS
Basic Operation Keys
o
On/Clear — Turns power on. Pressing once clears
the display. Pressing twice clears all temporary values.
O
Off — Turns all power off, clearing all non-permanent
registers. For desktop model 44080, press Ç o
to turn power off.
+–x
÷=
Arithmetic operation keys.
%
Four-function (+, -, x, ÷) percent key. (See page 25
for examples.)
0 – 9 and • Keys used for entering digits.
)
(DESKTOP ONLY) Enters “00” to save keystrokes (e.g.,
1 ) to enter 100).
B
Backspace Key — Used to delete entries one keystroke at a time (unlike the o function, which
deletes the entire entry).
Convert Ç Key — Unit Conversions and Second Functions
The Ç key is used to convert between measurement units or to
access the second functions listed below:
Çx
Clear All — Clears all values, including Memory.
Resets all permanent entries to default values
(except Preference Settings which are retained).
Note: Use only when necessary, as it resets all stored values to
factory defaults. See page 82 for a listing of default values.
Ç%
x 2 — Squares the value in the display. For example,
to square the value 10, enter 1 0 then Ç %.
ÇB
Square Root Function (
) — Used to find the
square root of a non-dimensional or area value
(e.g., 1 0 0 Ç B = 10).
Ç/
x10 y — Allows entry of an exponent. For example,
8 Ç / 1 4 is 8 times 10 to the 14th power.
Ç÷
1/x — Finds the reciprocal of a number (e.g., 8
Ç ÷ = 0.125).
USER’S GUIDE — 1
Ç–
Change Sign (+/–) — Toggles the sign of the displayed value to positive or negative.
Ç+
Pi (π) — Constant = 3.141593
Ç•
Degrees:Minutes:Seconds (dms deg) —
Converts between D:M:S and decimal degree formats.
Ç0
Total Cost (Cost) — Calculates total material cost
given a unit dimension and an entered Per Unit Cost.
Çß
Access Preference Settings (Prefs) — Used to
access various customizable settings, such as
dimensional answer formats (see Preference
Settings on page 83).
Memory and Storage Functions
µ
Cumulative Memory — Whenever the µ key is
pressed, the displayed value will be added to the
Memory. Other memory functions:
FUNCTION
Add to Memory
Subtract from Memory
Recall total in Memory
Display/Clear Memory
Clear Memory
KEYSTROKES
Ç
®
®
Ç
µ
µ
µ
®
®
Memory is semi-permanent, clearing only when you:
1)
2)
3)
4)
turn off the calculator;
press ® ®;
press Ç ®;
press Ç x (Clear All).
When memory is recalled (® µ), consecutive
presses of µ will display the calculated average
and total count of the accumulated values.
ß1–3
Storage Registers (M1) through (M3) — Stores
the displayed value in non-cumulative, permanent
Memory (e.g., 1 0 ß 1). Good for storing a
single value, for future reference (® 1 = 10).
Note: Non-cumulative means it only accepts one value (does not
add or subtract) and a second entered value will replace the first.
Permanent means the value is stored even after the calculator is
shut off. To delete a stored value, enter a new value or perform a
Clear All ( Ç x).
2 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Recall ® Key
The ® key is used to recall or review stored values (e.g., ® p
to recall a previously entered pitch value). It is also used in reviewing
stored settings, or in Paperless Tape and Memory operation (see
below).
®=
Paperless Tape (Tape) — Accesses the paperless
tape mode (see “Paperless Tape” page 27), which
keeps track of your past 20 entries. Useful for
checking strings of numbers.
®®
Clear M+ — Displays and clears M+.
®µ
Recall M+ — Displays value stored in M+.
®1–3
Recall (M1) through (M3) — Recalls the value
stored in M1, M2, or M3.
Dimensional Measurement Unit Keys
The following keys are used for entering units of measure, with ease
and accuracy:
y
Yards — Enters or converts to Yards.
f
Feet — Enters or converts to Feet. Also used with
the i and / keys for entering Feet-Inch values
(e.g., 6 f 9 i 1 / 2).
Note: Repeated presses of f after Ç toggle between FeetInches and Decimal Feet (e.g., 6 f 9 i 1 / 2 Ç f =
6.791667 Feet; press f again to return to Feet-Inch-Fractions).
i
Inches — Enters or converts to Inches. Also used
with the / key for entering fractional Inch values
(e.g., 9 i 1 / 2).
Note: Repeated presses of i after Ç toggle between
Fractional and Decimal Inches (e.g., 9 i 1 / 2 Ç i =
9.5 Inch; press i again to return to Fractional Inches).
/
Fraction Bar — Used to enter fractions. Fractions
may be entered as proper (1/2, 1/8, 1/16) or improper
(3/2, 9/8). If the denominator (bottom) is not entered,
the calculator's fractional resolution setting is automatically used (e.g., entering 1 5 / = or + will
display 15/16, based on the default fractional resolution setting of 16ths.
USER’S GUIDE — 3
m
Meters — Enters or converts to Meters.
Ç7
Centimeters (cm) — Enters or converts to
Centimeters.
Ç9
Millimeters (mm) — Enters or converts to
Millimeters.
Ç2
Acres (Acre) — Enters or converts (a square value)
to Acres.
Ç8
Board Feet (Bd Ft) — Enters or converts cubic
values to Board Feet. One Board Foot is equal to
144 Cubic Inches.
Area and Volume Keys (NOT AVAILABLE
ON TRIG MODEL
#4080)
l
Length — Enters a length for calculation of area or
volume.
W
Width — A multi-function key used to enter a width
for calculation of area or volume (if a length and
height are also entered). Consecutive presses of
this key display or calculate:
Press
1
2
3
4
5
6
h
Result
Displays Entered Width (WDTH)
Area (AREA)
Square-up (SQUP)
Perimeter (PER)
Redisplays Entered Length (LNTH)
Redisplays Entered Width (WDTH)
Height — A multi-function key used to enter a
height for calculation of volume (if a length and width
are also entered). Consecutive presses of this key
display or calculate:
Press
1
2
3
4
5
6
Result
Displays Entered Height (HGHT)
Volume (VOL)
Wall Area (WALL)
Total Room Area (ROOM)
Redisplays Entered Length (LNTH)
Redisplays Entered Width (WDTH)
4 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Weight Keys
Ç1
Kilograms (kg) — Enters or converts (a weight or volume value) to Kilograms. A dimensioned volume will
convert using the stored Weight per Volume value.
Ç3
Metric Tons (met tons) — Enters or converts (a
weight or volume value) to Metric Tons. A dimensioned volume will convert using the stored Weight
per Volume value.
Ç4
Pounds (lbs) — Enters or converts (a weight or volume value) to Pounds. A dimensioned volume will
convert using the stored Weight per Volume value.
Ç6
Tons (tons) — Enters or converts (a weight or volume value) to Tons. A dimensioned volume will convert using the stored Weight per Volume value.
ß0
Store Weight per Volume (wt/vol) — Stores a new
Weight per Volume value as Tons per Cubic Yard or
other format, as listed below:
Note: After entering a value and pressing ß 0, continue
pressing the 0 digit key until you’ve reached the desired weight
per volume format. To recall your setting, press ® 0.
• Ton Per CU YD
• LB Per CU YD
• LB Per CU FEET
• MET Ton Per CU M
• kG Per CU M
This value is permanently stored until you change it
or perform a Clear All (Ç x).
USER’S GUIDE — 5
Construction Project Keys and Functions
The following Construction Project Keys and Functions help you instantly
figure quantities and costs of materials, so you can build like a pro!
Block/Brick Function (NOT AVAILABLE
ON TRIG MODEL
#4080)
The Blocks function helps you quickly estimate the quantity of blocks
or bricks required for building walls, walkways or other areas.
Çl
Number of Blocks or Bricks (Blocks) —
Calculates the number of blocks (or bricks) based on:
• an entered or calculated linear value
• an entered or calculated area
• an entered value in l
• values entered in l and h (solved area)
Uses a standard block/mortar area of 128 Square
Inches and a block length of 16 Inches. This
function can also be used for calculating the number
of “face” or “paver” bricks by storing a brick size
(see below).
ß4
Store Block or Brick Size (Blk Size) — Used to
store: (1) a block area other than the default block
area of 128 Square Inches (e.g., 1 2 0 i i
ß 4 stores an area of 120 Square Inches) and
(2) a block length other than the default block length
of 16 Inches (e.g., 1 8 i ß 4 stores a length
of 18 inches). These values are permanently stored
until you change them or perform a Clear All (Ç
x). To recall the stored settings, press ® 4
(repeated presses of ® 4 toggle between block
area and block length).
Note: For Brick Estimates — You may also enter a brick size
using ß 4. For example, when building with standard “face”
bricks, enter a brick size of 21 Square Inches ( 2 1 i i
ß 4) or store a “paver” brick size of 32 Square Inches ( 3 2
i i ß 4; based on Modular U.S. brick size of
3-5/8 Inches x 2-1/4 Inches x 7-5/8 Inches, including 3/8-inch
mortar = 4 Inches x 2-5/8 Inches x 8 Inches).
6 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Circular/Arc Function Keys
The circle key helps you quickly solve circular area, volume or arc
problems.
C
Circle — Displays and calculates the following values, given an entered circle diameter* or radius:
• Diameter (DIA)
• Circle area (AREA)
• Circumference (CIRC)
*To enter a diameter (e.g., 10 Feet), press 1 0 f C.
Ça
Radius — Enters or calculates the circle radius
(e.g., 5 f Ç a).
a
Arc Length or Degree of Arc — A multi-function
key that enters or calculates Arc Length or Degree
of Arc, and further solves for additional circular/arc
values, including arched segment walls (based on
the stored On-center spacing), listed below.
Press
1
2
3
4
5
6
7
Result
Arc Length or Degree of Arc (ARC)
Chord Length (CORD)
Segment Area (SEG)
Pie Slice Area (PIE)
Segment Rise (RISE)
Stored On-Center Spacing (OC)
Length of Arched Wall 1* (AW 1)
* The calculator will calculate arched segment wall lengths (if
applicable) with consecutive presses of the a key until it reaches the last wall length.
R
Run (Chord Length) — Enters or calculates the
Chord Length. Used in conjunction with an entered
segment rise to solve for the radius of a circle or
with an entered radius to solve for the segment rise.
r
Rise (Segment Rise) — Enters or calculates the
segment rise. Used in conjunction with an entered
Chord Length to solve for the radius of a circle or
with an entered radius to solve for the Chord Length.
USER’S GUIDE — 7
Column/Cone Function
The Column and Cone function helps you quickly estimate volume
and surface area of columns or cones.
ÇC
Column and Cone (Column/Cone) — With an
entered diameter and height, the first and second
presses of C (following Ç) will calculate the
total volume and surface area of a Column; the third
and fourth consecutive presses of C calculate the
total volume and surface area of a Cone.
For Trig Model (#4080) Users:
As this model does not have a h key, you must enter the height using the r key.
Compound Miter/Crown Moulding Keys
The Construction Master Pro also calculates compound miter cut
angle solutions for cutting and installing crown moulding on a wall.
The Compound Miter function can also be used for finding angle
cuts for many types of compound miter problems, such as siding,
railing and trim.
Â
Compound Miter — With stored spring (crown)
angle and entered wall corner angle*, consecutive
presses of  will calculate the following:
Press
1
2
3
4
Result
Miter Angle (MITR)
Bevel Angle (BEVL)
Redisplays Stored Spring Angle (SPRG)
Redisplays Entered Wall Corner Angle (CRNR)
* Wall Corner Angle entries of less than 25 into  will be
assumed to be the number of sides of a polygon; in this case, the
calculator will calculate the unknown Wall Corner Angle first, then
proceed with the above angle calculations.
ßÂ
Store Spring Angle (Spring Angle) — Stores a
value other than the default spring (crown) angle of
45° (e.g., 3 8 ß Â stores 38° spring angle).
This value is permanently stored until you change it
or perform a Clear All (Ç x). To recall the stored
setting, press ® Â.
8 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Drywall Function (NOT AVAILABLE
Çh
ON TRIG MODEL
#4080)
Drywall Sheets (Drywall) — Calculates the number
of 4 x 8, 4 x 9, and 4 x 12 sheets for an entered or
calculated area.
Footing Function (NOT AVAILABLE
ON TRIG MODEL
#4080)
The Footing function helps you quickly estimate the volume of
concrete required for concrete footings.
ÇW
Footing — Calculates total quantity of concrete
required for concrete footings based on an entered
wall length and footing size. Size based on the
default footing size of 264 Square Inches (industry
standard).
ß6
Store Footing Area (Ftg Area) — Used to store a
value other than the default footing size of 264
Square Inches (e.g., 1 2 8 i i ß 6
stores a footing size of 128 Square Inches). This
value is permanently stored until you change it or
perform a Clear All (Ç x). To recall the stored
setting, press ® 6.
Polygon Function
The Polygon function is handy for calculating multi-sided shapes
(such as found in concrete applications).
ÇR
Polygon — With an entered diameter or radius and
number of sides of a polygon-shaped figure, Ç
R, calculates the following:
Press
1
2
3
4
5
6
7
Result
Full Angle (FULL)
Bi-Sect, or Half Angle (HALF)
Side Length (SIDE)
Perimeter of Polygon (PER)
Area of Polygon (AREA)
Radius* (RAD)
Redisplays Entered Number of Sides (SIDE)
*Solves radius for an entered diameter or redisplays the entered
radius.
USER’S GUIDE — 9
Right Triangle/Roof Framing Keys
Right Triangle:
Using the Pythagorean theorem, the top row of keys on your
Construction Master Pro will calculate instant solutions in dimensional
format to right triangle problems (particularly, roof framing).
The Construction Master Pro’s keys are labeled in easy to remember
roofing terms. The right triangle is calculated simply by entering two
of four variables: Rise, Run, Diagonal, or Pitch.
p
Pitch — Enters or calculates the Pitch (slope) of a
roof (or right triangle). Pitch is the amount of “rise”
over 12 Inches (or one meter) of “run.” Pitch may be
entered as:
•
•
•
•
a dimension: 9 i p
an angle or degrees: 3 0 p
a percentage (percent grade): 7 5 % p
a pitch ratio: 0 • 7 5 Ç p
Once a Pitch in one of the above formats is entered,
consecutive presses of p will convert to the
remaining Pitch formats listed above (e.g., Pitch in
Inches will convert to Pitch Degrees, Percent Grade
and Pitch Ratio/Slope).
Note: An entered (vs. calculated) pitch is a permanent entry. This
means that it will remain stored even after you turn the calculator
off. To change the Pitch, simply enter a new Pitch value.
In contrast, a calculated Pitch value is not permanently stored.
This means that the calculator will return to the Pitch value you
last entered when you clear the calculator or press o twice.
10 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Çp
Pitch Ratio or Slope (Slope) — Enters the Pitch as
a ratio or Slope of a roof (or right triangle). For
example, 0.58 slope is entered as • 5 8 Ç
p.
r
Rise — Enters or calculates the Rise or vertical leg
(height) of a right triangle.
R
Run —Enters or calculates the Run or horizontal leg
(base) of a right triangle.
d
Diagonal — Enters or calculates the diagonal leg
(hypotenuse) of a right triangle. Typical applications
are “squaring up” slabs or finding common rafter
lengths. Additional presses of the d key will also
display plumb and level cut angles in degrees.
Note: The Common rafter calculation is the “point-to-point” length
and does not include the overhang or ridge adjustment.
Hip/Valley and Jack Rafter Keys
The Construction Master Pro uses the Rise, Run, Diagonal, Pitch
and On-center spacing values to calculate Regular and Irregular
Hip/Valley and Jack rafter lengths (excluding wood thickness, etc.).
USER’S GUIDE — 11
When calculating Regular and Irregular Jack rafter lengths, you will
see the letters “JK” (Regular pitch side) or “IJ” (Irregular pitch side)
and the corresponding jack number to the left of your calculator display. This will help you keep track of the descending sizes and which
side the corresponding rafter is based on.
H
ÇH
Hip/Valley Rafter — Finds the Regular or Irregular
Hip/Valley rafter length.
•
Regular Hip/Valley Length: After right
triangle/rafter values are entered or calculated
(e.g., Pitch, Rise, Run), pressing H will calculate the length of the Regular Hip/Valley rafter.
•
Irregular Hip/Valley Length: If an irregular
pitch is entered (see next definition), pressing
H will calculate the Irregular Hip/Valley rafter
length. (An Irregular or “non-standard” roof has
two different Pitches/Slopes.)
•
Subsequent presses of the H key will also
display plumb, level, and cheek cut angle values
in degrees.
Irregular Pitch (Ir/Pitch) — Enters the irregular or
secondary pitch value used to calculate lengths of
the irregular hip/valley and jack rafters.
You may enter the irregular pitch as:
• a dimension: 9 i Ç H
• an angle: 3 0 Ç H
• a percentage: 7 5 % Ç H
Note: An entered irregular pitch can be recalled by pressing ®
Ç H.
j
Jack Rafters — Finds the descending Jack rafter
sizes for regular pitched roofs, based on the stored
On-center spacing and previously entered or calculated right triangle/rafter values (e.g., pitch, rise, run).
Repeated presses of the j key will display the incremental
jack adjustment, all the rafter sizes (on the Regular pitch side) as
well as display the plumb, level, and cheek cut angle values.
Additional presses will display the rafter sizes on the Irregular
pitch side (if an Irregular Pitch was entered; see above), or
repeat the previously displayed values.
(Cont’d)
12 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
Note: You may set your calculator to display the Jack Rafter
lengths in either ascending or descending order (see Preference
Settings on page 83).
Note: You may set your calculator to “mate up” with the Jack
Rafters, rather than using the entered or default On-center
spacing for both sides (see Preference Settings on page 83).
ß5
Store On-center (o.c.) Spacing — Used to store a
value other than the default of 16 Inches On-center
(e.g., 1 8 i ß 5 stores an 18-inch On-center)
for Jack Rafter calculations. Press ® 5 to review
the stored value.
Çj
Irregular Side Jacks (Ir/Jack) — Operates same
as j, but displays the rafter values from the
Irregular pitched side first.
Rake-Wall Function
Çr
Rake-Wall (R/Wall) — This function finds the stud
sizes in a Rake-Wall based on calculated or entered
values for pitch, rise and/or run. Repeated presses
of r will display the various sizes. The sizes can
be displayed in either descending (from longest to
shortest) or ascending (from shortest to the longest)
order, depending upon your preference setting (see
Preference Settings on page 83). If a dimensional
value is entered before pressing Ç r, this value
will be taken as the Rake-Wall base size and automatically added to the various rafter lengths.
ß5
Store On-center (o.c.) Spacing — Used to store a
value other than the default of 16 Inches On-center
(e.g., 1 8 i ß 5 stores an 18-inch On-center)
for Rake-Wall stud calculations. Press ® 5 to
review the stored value.
USER’S GUIDE — 13
Roof Materials/Covering Function
The Construction Master Pro's Roof function provides a quick calculation of roof area, number of squares and bundles, and number of
4 x 8 sheets required for roof coverage.
Çd
Roof — Given an entered Pitch (or Rise and Run)
and plan area (or Length and Width), calculates
the following:
Press
1
2
3
4
5
6
7
Result
Roof Area (ROOF)
Number of Roof Squares (SQRS)
Number of Roof Bundles (BNDL)
Roof Bundle Size* (B-SZ)
Number of 4 x 8 Sheets (4 X 8 )
Pitch (PTCH)
Plan Area (PLAN)
*Roof bundle size is 33.33 Square Feet.
Stair Key
The Construction Master Pro easily calculates stair layout solutions.
With entered values for floor-to-floor rise and/or run, it will calculate
Riser, Tread, Stringer, and Incline Angle values simply by pressing
the s key.
s
Stair — A multi-function key that uses a stored Riser
Height, stored Tread Width, stored Headroom
Height and Floor Thickness, and entered Rise and
Run values to calculate and display the following:
Press
1
2
3
4
5
6
7
8
9
10
11
Result
Actual Riser Height (R-HT)
Number of Risers (RSRS)
Riser Overage/Underage (R+/-)
Tread Width (T-WD)
Number of Treads (TRDS)
Tread Overage/Underage (T+/-)
Stairwell Opening (OPEN)
Stringer Length (STRG)
Incline Angle* (INCL)
Run of Treads (RUN)
Floor-to-Floor Rise (RISE)
(Cont’d)
14 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
Press
12
13
14
15
Result
Stored (Desired) Riser Height (R-HT STORED )
Stored (Desired) Tread Width (T-WD STORED )
Stored Headroom (HDRM STORED )
Stored Floor Thickness (FLOR STORED )
Note: Default values are 7-1/2 Inches for Desired Riser Height
and 10 Inches for Desired Tread Width, 10 Inches for Floor
Thickness, and 6 Feet 8 Inches for Headroom Height.
Note: It is not possible for the calculator to include the nose/overhang measurement. Thus, you need to adjust for this measurement per local codes.
*If the inclination angle exceeds the stored riser height and Tread
Width ratio by 10%, the yield symbol will appear, indicating a
steep incline.
ß7
Store Desired Riser Height (Riser Ht) — Stores a
value other than the default desired stair riser height
of 7-1/2 Inches (e.g., 8 i ß 7 stores an
8-inch desired stair riser height). To recall the stored
setting, press ® 7.
ß8
Store Floor Thickness/Height (Floor Ht) — Stores
a value other than the default desired floor thickness
of 10 Inches (e.g., 8 i ß 8 stores an 8-inch
desired floor thickness). To recall the stored setting,
press ® 8. This is used, along with stored headroom height, for calculating the length of the stairwell opening.
ß9
Store Desired Tread Width (Tread W) — Stores a
value other than the default desired stair Tread
Width of 10 Inches (e.g., 1 2 i ß 9 stores a
12-inch desired stair Tread Width). To recall the
stored setting, press ® 9.
Ç ß ß Set Headroom Height — Sets the desired
ßß
Headroom Height for calculation of the stairwell
opening. Default is 6 Feet 8 Inches. Use the + key
to increase and the – key to decrease the stored
headroom height. See Preference Settings instructions on page 86.
USER’S GUIDE — 15
Çs
Riser Limited — Used for situations when the riser
height is limited by local code. When you press Ç
s, the calculator will recalculate stair values so
that the actual Riser Height will not exceed your
stored desired Riser Height (e.g., it will never
exceed the stored desired Riser Height of
7-1/2 Inches, if 7-1/2 Inches is the value stored
using ß 7). To compensate for this limitation, the
calculator will add one to the number of risers.
Studs Function
The Construction Master Pro also calculates the number of studs
required for a wall using an entered length and stored On-center
spacing value.
Ç5
Studs — Calculates the number of studs for an
entered or displayed linear value. Based on the
stored On-center spacing (16 inches is the default).
Trigonometric Keys (TRIG #4080 AND DESKTOP #44080 MODELS ONLY)
Tangent Ø =
Opposite
Adjacent
Sine Ø
=
Opposite
Hypotenuse
Cosine Ø
=
Adjacent
Hypotenuse
16 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
The Trig model (#4080) and Desktop (#44080) calculators have
standard trigonometric keys, in addition to right triangle/rafter keys
(e.g., Rise, Run, Diagonal), for advanced right triangle mathematics.
The Sine, Cosine and Tangent of an angle are defined in relation to
the sides of a right triangle.
Using the Ç key with the trigonometric function displays the
inverse (Arcsine, Arccosine, and Arctangent). These are used to find
the angle for the Sine, Cosine, or Tangent value entered.
S
Sine Function — Calculates the Sine of an entered
degree or non-dimensioned* value.
ÇS
Arcsine (sin -1) — Calculates the angle for the
entered or calculated Sine value.
ç
Cosine Function — Calculates the Cosine of a
degree or non-dimensioned* value.
Çç
Arccosine (cos -1) — Calculates the angle for the
entered or calculated Cosine value.
t
Tangent Function — Calculates the Tangent of a
degree or non-dimensioned* value.
Çt
Arctangent (tan -1) — Calculates the angle for the
entered or calculated Tangent value.
*Cannot use on dimensioned values.
USER’S GUIDE — 17
ENTERING DIMENSIONS
Entering Linear Dimensions
When entering Feet-Inch-Fraction values, enter dimensions from
largest to smallest — e.g., Feet before Inches, and Inches before
Fractions. Enter Fractions by entering the numerator (top), pressing
/ (fraction bar key), and then the denominator (bottom).
Note: If a denominator is not entered, the fractional setting value is used.
Examples of Entering Linear Dimensions:
DIMENSION
Clear calculator
5 Feet 1-1/2 Inch
Clear calculator
5 Yards
Clear calculator
17.5 Meters
KEYSTROKES
o
5f1i1/2
o
5y
o
17•5m
Entering Square/Cubic Dimensions
The Construction Master Pro lets you easily enter Square and Cubic
values. Simply press a dimensional unit key two times to label a
number as a Square value, or three times to label a Cubic value.
Note: If you pass the desired dimensional format, keep on pressing the dimensional
unit key until the desired result is displayed again.
Enter Square and Cubic dimensions in the following order:
(1) Enter numerical value (e.g., 1 0 0).
(2) Press desired unit key (e.g., f) to label value as “linear”.
KEYSTROKE
DISPLAY
oo
0.
100f
100 FEET
(3) Second press of unit key (e.g., f f) labels value as “Square”.
KEYSTROKE
DISPLAY
oo
0.
100ff
100 SQ FEET
(4) Third press of unit key (e.g., f f f) labels value as “Cubic”.
KEYSTROKE
oo
100fff
DISPLAY
0.
100
Note: Feet-Inches format cannot be used to enter Square or Cubic values.
18 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
CU FEET
Examples of Entering Square and Cubic Dimensions:
YARDS
y y — Square Yards
(e.g., 5 y y will display 5 SQ YD).
y y y — Cubic Yards
(e.g., 5 y y y will display 5 CU YD).
FEET
f f — Square Feet
(e.g., 5 f f will display 5 SQ FEET).
f f f — Cubic Feet
(e.g., 5 f f f will display 5 CU FEET).
INCHES
i i — Square Inches
(e.g., 5 i i will display 5 SQ INCH).
i i i — Cubic Inches
(e.g., 5 i i i will display 5 CU INCH).
METERS
m m — Square Meters
(e.g., 5 m m will display 5 SQ M).
m m m — Cubic Meters
(e.g., 5 m m m will display 5 CU M).
CENTIMETERS
Ç 7 7 — Square Centimeters
(e.g., 5 Ç 7 7 will display 5 SQ CM).
Ç 7 7 7 — Cubic Centimeters
(e.g., 5 Ç 7 7 7 will display 5 CU CM).
MILLIMETERS
Ç 9 9 — Square Millimeters
(e.g., 5 Ç 9 9 will display 5 SQ MM).
Ç 9 9 9— Cubic Millimeters
(e.g., 5 Ç 9 9 9 will display 5 CU MM).
USER’S GUIDE — 19
SETTING FRACTIONAL RESOLUTION
The Construction Master Pro is set to display fractional answers in
16ths of an Inch. All examples in this User’s Guide are based on
1/16”. However, you may select the fractional resolution to be displayed in other formats (e.g., 1/64”, 1/32”, etc.). The method for
permanently changing fractional resolution is shown below.
Setting Fractional Resolution
— Using the Preference Setting Mode
KEYSTROKE
1. Access Preference Settings:
Ç ß (Prefs)
2. Access Next Fraction Subsetting:
+
+
+
+
+
+ (repeats options)
DISPLAY
FRAC 0-1/16
INCH*
FRAC 0-1/32
FRAC 0-1/64
FRAC 0-1/2
FRAC 0-1/4
FRAC 0-1/8
FRAC 0-1/16
INCH
INCH
INCH
INCH
INCH
INCH
3. To Permanently Set the Fractional Resolution You Have Selected
Above, press o (or any key) to set the displayed Fractional
Resolution and Exit Preference Settings.
o
0.
4. To Recall Your Selected Fractional Resolution:
®/
STD 0-1/16
INCH
*1/16” is the default setting. The display may differ from the example depending on
what the resolution is currently set to.
20 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Converting a Fractional Value to a Different Resolution
Add 44/64th to 1/64th of an Inch and then convert the answer to
other fractional resolutions:
KEYSTROKE
oo
44/64
+1/64=
Ç 1 (1/16)
Ç 2 (1/2)
Ç 3 (1/32)
Ç 4 (1/4)
Ç 6 (1/64)
Ç 8 (1/8)
o o*
DISPLAY
0.
0-44/64
0-45/64
0-11/16
0-1/2
0-23/32
0-3/4
0-45/64
0-3/4
INCH
INCH
INCH
INCH
INCH
INCH
INCH
INCH
0.
* Changing the Fractional Resolution on a displayed value does not alter your
Permanent Fractional Resolution Setting (set via Preference Settings).
Note: This setting is temporary; it will revert back to your permanent fractional setting
upon press of o, or when you turn the calculator off.
USER’S GUIDE — 21
CONVERSIONS (LINEAR, AREA, VOLUME)
Linear Conversions
Convert 14 Feet to other dimensions:
KEYSTROKE
DISPLAY
oo
14f
Çy
Çf
Çi
Çm
Ç 7 (cm)
Ç 9 (mm)
0.
14 FEET
4.666667 YD
14 FEET 0 INCH
168 INCH
4.267 M
426.72 CM
4267.2 MM
Note: When performing multiple conversions, you only have to press the Ç key
once except when accessing secondary functions, such as Ç 7 for Centimeters.
Converting Feet-Inch-Fractions to Decimal Feet
Convert 15 Feet 9-1/2 Inches to Decimal Feet. Then convert back to
Feet-Inch-Fractions.
KEYSTROKE
DISPLAY
oo
15f9i1/2
Çf
f*
0.
9-1/2 INCH
15.79167 FEET
15 FEET 9-1/2 INCH
15
FEET
Converting Decimal Feet to Feet-Inch-Fractions
Convert 17.32 Feet to Feet-Inch-Fractions.
KEYSTROKE
oo
17•32f
Çf
f*
DISPLAY
17
FEET
0.
17.32 FEET
3-13/16 INCH
17.32 FEET
* Repeated presses of f or i will toggle between Feet-Inch-Fractions and
Decimal Feet or Inches.
22 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Converting Fractional Inches to Decimal Inches
Convert 8-1/8 Inches to Decimal Inches. Then convert to Decimal Feet.
KEYSTROKE
DISPLAY
oo
8i1/8
Çi
f
i*
0.
8-1/8 INCH
8.125 INCH
0.677083 FEET
8.125 INCH
Converting Decimal Inches to Fractional Inches
Convert 9.0625 Inches to Fractional Inches. Then convert to Decimal
Feet.
KEYSTROKE
DISPLAY
oo
9•0625i
Çi
f f*
0.
9.0625 INCH
9-1/16 INCH
0.755208 FEET
*Repeated presses of f or i will toggle between Feet-Inch-Fractions and
Decimal Feet or Inches.
Square Conversions
Convert 14 Square Feet to other Square dimensions:
KEYSTROKE
DISPLAY
oo
14ff
Çi
Çy
Çm
Ç 7 (cm)
0.
14 SQ FEET
2016. SQ INCH
1.555556 SQ YD
1.300643 SQ M
13006.43 SQ CM
Cubic Conversions
Convert 14 Cubic Feet to other Cubic dimensions:
KEYSTROKE
oo
14fff
Çi
Çy
Çm
DISPLAY
0.
14 CU FEET
24192. CU INCH
0.518519 CU YD
0.396436 CU M
USER’S GUIDE — 23
PERFORMING BASIC MATH WITH DIMENSIONS
Adding Dimensions
KEYSTROKE
DISPLAY
Add 11 Inches to 2 Feet 1 Inch:
11i+2f1i=
3
Add 5 Feet 7-1/2 Inches to 18 Feet 8 Inches:
5f7i1/2+18f8i=
24
0
INCH
3-1/2
INCH
FEET
FEET
Subtracting Dimensions
KEYSTROKE
Subtract 3 Feet from 11 Feet 7-1/2 Inches:
11f7i1/2–3f=
DISPLAY
8
FEET
7-1/2
INCH
49
INCH
Subtract 32 Inches from 81 Inches:
81i–32i=
Multiplying Dimensions
KEYSTROKE
DISPLAY
Multiply 5 Feet 3 Inches by 11 Feet 6-1/2 Inches:
5f3ix11f6i1/2=
60.59375
SQ FEET
Multiply 2 Feet 7 Inches by 10:
2f7ix10=
10
25
FEET
INCH
Dividing Dimensions
KEYSTROKE
DISPLAY
Divide 30 Feet 4 Inches by 7 Inches:
30f4i÷7i=
Divide 20 Feet 3 Inches by 9:
20f3i÷9=
24 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
52.
2
FEET
3
INCH
Percentage Calculations
The percent % key is used to find a given percent of a number or to
perform add-on, discount or division percentage calculations. You
may also perform percentage calculations with dimensional units
(Feet, Inch, etc.), in any format (linear, Square or Cubic).
Examples:
KEYSTROKE
DISPLAY
Find 18% of 500 Feet:
500fx18%
90
Add 10% to 137 Square Feet:
137ff+10%
150.7
Subtract 20% from 552 Feet 6 Inches:
552f6i–20%
442
Divide 350 Cubic Yards by 80%:
350yyy÷80%
FEET
0
INCH
SQ FEET
FEET
437.5
0
INCH
CU YD
MEMORY OPERATION
Your calculator has two types of Memory operations:
1) a standard, cumulative, semi-permanent Memory µ; and
2) three storage registers M1, M2, and M3, used to permanently store single, non-cumulative values.
Memory commands are listed below.
FUNCTION
KEYSTROKES
µ:
Add value to M+
Subtract value from M+
Clear M+
Display and Clear M+
Recall stored value
Ç
Ç
®
®
M1/M2/M3:
Store single value in M1
Store single value in M2
Store single value in M3
Clear register M1
ß
ß
ß
0ß
µ
µ
®
®
µ
1
2
3
1
(Cont’d)
USER’S GUIDE — 25
(Cont’d)
FUNCTION
KEYSTROKES
0ß2
0ß3
Clear register M2
Clear register M3
®1
®2
®3
Recall stored value in M1
Recall stored value in M2
Recall stored value in M3
Basic Cumulative Memory (M+)
Example:
Store 100 into M+, add 200, and then subtract 50. Display the total,
average, and total count. Clear the Memory:
KEYSTROKE
DISPLAY
100µ
200µ
5 0 Ç µ (M-)
®µ
µ
µ
®®
M+ 100. M
M+ 200. M
M- 50. M
TTL STORED 250. M
AVG 83.33333 M
CNT 3. M
M+ 250.
Note: To Clear Memory (M+):
- press ® ®;
- Ç ®; or
- turn off the calculator.
Permanent Storage Registers (M1 and M2)
Examples:
Store a rate of $175 into M1 and recall the value:
KEYSTROKE
DISPLAY
175ß1
Oo
®1
M-1
STORED
M-1
STORED
175.
0.
175.
Store 1,575 Square Yards into M2 and recall the value:
KEYSTROKE
1575yyß2
Oo
®2
DISPLAY
M-2
STORED
1575.
SQ YD
M-2
STORED
1575.
SQ YD
0.
Note: To Clear M1-M3: Values stored in M1-M3 will remain permanently stored, even
after you turn the calculator off. You will never need to clear the storage registers;
simply enter a new value. However, if you wish to clear M1-M3 to “zero”:
- Enter 0 ß 1, 0 ß 2, or 0 ß 3 or Ç x to clear all registers
26 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
PAPERLESS TAPE OPERATION
Note: Not available on DT (Desktop) Printer — Model #44065.
The Paperless Tape allows you to display and review the last twenty
entries of a regular math or basic dimensional math string calculation.
To access this mode after entering values, press ® =. Then,
press + or – to scroll forward or backward through the entries.
While in the Paperless Tape mode, the display will show the previously
entered or calculated value, along with the sequential number of
entry (e.g., 01, 02, 03, etc.) and the math operator (+, –, x, ÷, %) in
the upper left corner of the display.
Note: If = has been used in the middle of a string, SUB (for Subtotal) will display in
the upper left. If = was the last operation performed, the display will show TTL (Total)
as the last entry.
To exit this mode, press = to exit and maintain the last entry on the
display. When exiting, the last entry (or TTL) will be displayed, allowing you to continue using the last tape value for another operation, if
desired.
Note: The Paperless Tape is cleared when:
- o is pressed twice;
- upon a new calculation (new equation string is started); or
- when the calculator is shut off.
Example:
KEYSTROKE
1. Enter a string of numbers:
4f+
5f+
6f+
7f=
DISPLAY
4
9
15
22
FEET
INCH
FEET
0
0
0
0
2. Access the tape function:
®=
TTL= 22
FEET
0
INCH
3. Scroll from first value to total:
+
+
+
+
+
01 4
02+ 5
03+ 6
04+ 7
TTL = 22
FEET
0
0
0
0
0
INCH
FEET
FEET
FEET
FEET
FEET
FEET
INCH
INCH
INCH
INCH
INCH
INCH
INCH
(Cont’d)
USER’S GUIDE — 27
(Cont’d)
KEYSTROKE
4. Scroll last two values:
–
–
5. Exit tape function and continue:
=
+
2f=
DISPLAY
04+ 7
03+ 6
FEET
TTL= 22
22
24
FEET
28 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
FEET
FEET
FEET
0
0
INCH
0
0
0
INCH
INCH
INCH
INCH
EXAMPLES — USING THE CONSTRUCTION
MASTER PRO
The Construction Master Pro calculators have keys and functions
labeled in common building terms. Just follow the examples and
adapt the keystrokes to your specific application.
Please note that some of the following examples will not apply to
your specific calculator model. For example, the Trig Model (#4080)
has trigonometry functions, but does not have l, W or h
keys, or Blocks, Footing or Drywall functions.
It is good practice to clear your calculator (press o twice) before
beginning each problem. And remember to use the Backspace B
key to correct entries one entry at a time.
LINEAR MEASUREMENT EXAMPLES
Adding Linear Measurements
Find the total length of the following measurements: 5 Feet 4-1/2
Inches, 8 Inches and 3.5 Yards.
KEYSTROKE
1. Add the measurements:
oo
5f4i1/2+
8i+
3•5y
2. Find the total:
=
DISPLAY
5
6
FEET
16
FEET
FEET
0.
4-1/2 INCH
0-1/2 INCH
3.5 YD
6-1/2
INCH
Cutting Boards
How many 2-foot 2-inch pieces can be cut from one 10-foot board?
KEYSTROKE
Divide board length by smaller cuts:
oo
10f
÷2f2i=
DISPLAY
0.
10 FEET
4.615385
(4 whole pieces)
USER’S GUIDE — 29
Window Measurement
What is the total width of three window openings, if each measures
2 Feet 5 Inches in width?
KEYSTROKE
DISPLAY
1. Enter window width:
oo
2f5i
2
FEET
5
INCH
2. Find total width:
x3=
7
FEET
3
INCH
7.25
FEET
3. Convert to Decimal Feet:
f
0.
Calculating the Center Point
You have a room that measures 13 Feet 8 Inches by 14 Feet
10 Inches. Find the center point to install a ceiling fan.
KEYSTROKE
1. Divide length in half, to figure first center point:
oo
13f8i
÷2=
DISPLAY
0.
13 FEET 8
6 FEET 10
INCH
INCH
2. Divide width in half, to figure second center point:
14f10i
14 FEET 10 INCH
÷2=
7 FEET 5 INCH
Therefore, you should install the fan at the intersection of 6 Feet
10 Inches length and 7 Feet 5 Inches width.
30 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
AREA CALCULATIONS
Square Area (x2)
What is the area of a square room with sides measuring 7 Feet
4 Inches?
KEYSTROKE
oo
7 f 4 i Ç % (x 2)
DISPLAY
0.
53.77778
SQ FEET
Area of a Rectangular Room (LxW)
What is the area of a room measuring 12 Feet 6 Inches by 15 Feet
8 Inches?
KEYSTROKE
oo
12f6i
x15f8i=
DISPLAY
0.
12 FEET 6 INCH
195.8333 SQ FEET
Note: You can also find area using the l and W keys as seen in the next problem.
However, these keys are not available on the Trig Model (#4080).
Using Multi-Function W Key to Find Area, Square-up and
Perimeter (NOT AVAILABLE ON TRIG MODEL #4080)
Find the area, square-up and perimeter of a space measuring
20 Feet 6 Inches by 25 Feet 6 Inches:
KEYSTROKE
oo
20f6il
25f6iW
W
W
W
DISPLAY
0.
LNTH 20 FEET 6 INCH
WDTH 25 FEET 6 INCH
AREA 522.75 SQ FEET
SQUP 32 FEET 8-5/8 INCH
PER 92 FEET 0 INCH
USER’S GUIDE — 31
VOLUME CALCULATIONS
Rectangular Containers (LxWxH)
What is the volume of a rectangular container that measures 3 Feet
by 1 Foot 9-5/8 Inches by 2 Feet 4 Inches?
KEYSTROKE
1. Find volume in Cubic Feet:
oo
3f
x1f9i5/8
x2f4i=
DISPLAY
0.
3 FEET
1 FEET 9-5/8 INCH
12.61458 CU FEET*
2. Convert to Cubic Yards:
Çy
0.467207
CU YD
*If the “Volume Display Format” Preference Setting is set to Cubic Yards or Cubic
Meters, your result will display accordingly. (See Preference Settings on page 83.)
Using the Multi-Function h Key to Find Volume, Wall Area
and Room Area (NOT AVAILABLE ON TRIG MODEL #4080)
Find the volume, wall area and total surface/room area* if you have
a length of 15 feet, width of 20 feet and height of 12 feet.
*Room Area includes four walls plus ceiling area.
KEYSTROKE
oo
15fl
20fW
12fh
h
h
h
DISPLAY
0.
LNTH 15 FEET 0 INCH
WDTH 20 FEET 0 INCH
HGHT 12 FEET 0 INCH
VOL 3600. CU FEET
WALL 840. SQ FEET
ROOM 1140. SQ FEET
32 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Volume of a Cylinder
Calculate the volume of a cylinder with a diameter of 2 Feet 4 Inches
and a height of 4 Feet 6 Inches:
Note: For a cylinder, use the Column function.
KEYSTROKE
1. Find Circle area:
oo
2f4i
CC
2. Enter height and find volume:
4f6ih
ÇC
DISPLAY
0.
2 FEET 4 INCH
AREA 4.276057 SQ FEET
HGHT 4 FEET 6 INCH
COL 19.24226 CU FEET
Volume of a Cone
Calculate the volume of a Cone with a diameter of 3 Feet 6 Inches
and a height of 5 Feet:
KEYSTROKE
DISPLAY
1. Find Circle area:
oo
3f6iC
C
0.
DIA 3 FEET 6 INCH
AREA 9.621128 SQ FEET
2. Enter height and find volume:
5fh
Ç C C C*
HGHT 5 FEET 0 INCH
CONE 16.03521 CU FEET
*To access Cone volume, you must press the C key three times after Ç.
For Trig Model (#4080) Users:
As this model does not have a h key, you must enter the height using the r key.
USER’S GUIDE — 33
WEIGHT/VOLUME CONVERSIONS
Weight Conversions
Convert 2,500 Pounds to Kilograms, Tons and Metric Tons:
KEYSTROKE
DISPLAY
1. Enter Pounds:
oo
2 5 0 0 Ç 4 (lbs)
0.
2500
2. Convert to Kilograms, Tons and Metric Tons:
Ç 1 (kg)
Ç 6 (tons)
Ç 3 (met tons)
LB
1133.981 kG
1.25 Ton
1.133981 MET Ton
Weight per Volume/Volume Conversions
Convert 5 Cubic Yards of concrete to Pounds, Tons and Kilograms, if
concrete weighs 1.5 Tons per Cubic Yard.
KEYSTROKE
1. Store Weight per Volume:
oo
1 • 5 ß 0* (wt/vol)
DISPLAY
0.
STORED
2. Enter concrete volume:
5yyy
3. Convert to Pounds, Tons and Kilograms:
Ç 4 (lbs)
Ç 6 (tons)
Ç 1 (kg)
1.5
Ton Per CU YD
5
CU YD
15000. LB
7.5 Ton
6803.886 kG
*If calculator does not display Tons per Cubic Yard, keep pressing the 0 key until the
desired format is displayed (e.g., Ton Per CU YD, LB Per CU YD, LB Per CU FEET,
MET Ton Per CU M, or kG Per CU M).
34 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
BLOCKS/BRICKS (NOT AVAILABLE
ON TRIG MODEL
#4080)
Number of Blocks, Based on Entered Length and Height
You are building an “L” shaped retaining wall out of standard 8-inch x
16-inch size blocks (Note: this is the default block size of 128 Square
Inches). One side of the retaining wall is 22 Feet long, and the other
side is 15 Feet 8 Inches long. The wall is to be 4 Feet high. How many
blocks are required to build this wall? Add a 5% waste allowance.
Note: The calculated area from an entered length (l) and height (h) will be
used for calculating blocks if these values exist.
KEYSTROKE
1. Find total wall length:
oo
® Ç 4* (Blk Size)
22f+15f8i=
l
DISPLAY
0.
B--AR
128. SQ
37 FEET 8
LNTH 37 FEET 8
2. Enter wall height as height:
4fh
STORED
HGHT 4
0
FEET
INCH
INCH
INCH
INCH
3. Find the number of blocks and add 5% waste allowance:
Ç l (Blocks)
BLKS 169.5
+5%
177.975
(178 Blocks)
*If ® Ç l (Blocks) does not result in 128 Square Inches,
then enter the following:
1 2 8 i i ß 4 (Blk Size) B--AR STORED 128. SQ INCH
-OR8ix16i=
ß 4 (Blk Size)
B--AR
STORED
128.
128.
SQ INCH
SQ INCH
Number of Blocks, Based on Entered Area
Find the number of blocks required for an area measuring 300
Square Feet. Then add a 3% waste allowance.
KEYSTROKE
oo
300ff
Ç l (Blocks)
+3%
DISPLAY
0.
300 SQ FEET
BLKS 337.5
347.625
(348 Blocks)
USER’S GUIDE — 35
Number of Blocks, Based on Calculated Perimeter
Calculate the wall’s perimeter if the length is 30 Feet and width is 45
Feet. Then, find the number of blocks required. Add a 3% waste
allowance.
KEYSTROKE
1. Find wall area:
oo
30fl
45fW
2. Find the perimeter:
WWW
DISPLAY
0.
LNTH 30
WDTH 45
FEET
INCH
FEET
0
0
PER 150
FEET
0
INCH
INCH
3. Find the number of blocks for the displayed perimeter, and add
3% waste allowance:
= Ç l (Blocks)
BLKS 112.50
+3%
115.875
(116 Blocks)
Number of Blocks, Based on Entered Length
Calculate the number of blocks required for a length of 20 Feet.
KEYSTROKE
DISPLAY
1. Enter length then calculate number of blocks:
oo
20f
Ç l (Blocks)
2. Display the stored block length*:
l
0.
20 FEET
BLKS 15.
B-LN
STORED
16
INCH
Note: The calculator will calculate the number of blocks based on the entered length
and the stored block size (length).
*If the stored block length is not 16 Inches, then enter the following:
1 6 i ß 4 (Blk Size)
B-LN
36 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
STORED
16
INCH
Number of “Face” Bricks
How many “face” bricks (21 Square Inch size) will you need to purchase
to cover a 40-Foot by 8-Foot wall, if you include a 3% waste
allowance? Use the Blocks function for calculating bricks.
KEYSTROKE
DISPLAY
1. Enter and store brick area into Block Size storage key:
oo
0.
2 1 i i ß 4 (Blk Size)
B--AR STORED 21. SQ INCH
2. Enter length and height of wall:
40fl
8fh
LNTH 40
HGHT 8
FEET
FEET
0
0
INCH
INCH
3. Find the number of bricks and add a 3% waste allowance:
Ç l (Blocks)
BLKS 2194.286
+3%
2260.114
(2261 Bricks)
4. Reset block area to default value:
1 2 8 i i ß 4 (Blk Size)
B--AR
128.
STORED
SQ INCH
Number of “Paver” Bricks
How many “paver” bricks (32 Square Inch size) will you need to fill a
5-Foot by 15-Foot walkway?
KEYSTROKE
DISPLAY
1. Enter brick area into Block Size storage key:
oo
3 2 i i ß 4 (Blk Size)
B--AR
2. Enter length and width (as height):
5fl
15fh
0.
32.
STORED
LNTH 5
HGHT 15
3. Find the number of bricks:
Ç l (Blocks)
SQ INCH
FEET
FEET
0
0
INCH
INCH
BLKS 337.5
(338 Bricks)
4. Reset block area to default value:
1 2 8 i i ß 4 (Blk Size)
B--AR
STORED
128.
SQ INCH
USER’S GUIDE — 37
BOARD FEET — LUMBER ESTIMATION
The Construction Master Pro easily calculates board feet for lumber
estimation problems. The default entry format for Board Feet is “Inch x
Inch x Feet” (e.g., 2 x 4 x 1 4 is 2 Inches x 4 Inches x 14 Feet).
You can also convert Cubic values (volume) to Board Feet.
Total Board Feet — With Dollar Cost
Find the total board feet for the following board sizes:
18'
16'
14'
2"
2"
4"
2"
10"
12"
If the boards cost $250 per MBM., what is the total cost? Use Ç 0
(Cost) to figure total lumber cost.
KEYSTROKE
DISPLAY
1. Enter board sizes, convert to board feet and store in memory:
oo
0.
2x4x14Ç8µ
BDFT 9.333333 M
2x10x16Ç8µ
BDFT 26.66667 M
2x12x18Ç8µ
BDFT 36. M
2. Recall total Board Feet and calculate total cost:
®®
x 2 5 0 Ç 0 (Cost)
BDFT 72.
$18.00
Note: Unit cost is entered in the standard per thousand Board Foot measure (MBM)
format.
Number of Board Feet Based on Entered Volume
Find the number of board feet required for a volume of 150 cubic feet.
KEYSTROKE
Enter cubic feet and convert to board feet:
oo
150fff
Ç 8 (Bd Ft)
38 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
DISPLAY
0.
150 CU FEET
BDFT 1800.
CIRCLE AND ARC CALCULATIONS
Circle/Arc values can be solved by entering any two of the following
values: Arc Length/Angle, Diameter/Radius, Chord Length (Run),
and Segment Rise (Rise).
It is recommended that you clear the calculator (press o twice)
after calculating right-triangle solutions prior to beginning an Arc or
Circle solution.
Note: Circle/Arc solutions cannot be solved for the following cases:
• Entered Arc Length and Chord Length (Run)
• Entered Arc Length and Segment Rise (Rise)
Circumference and Area of a Circle
Find the area and circumference of a circle with a diameter of
11 Inches:
KEYSTROKE
oo
11iC
C
C
DISPLAY
0.
DIA 11
AREA 95.03318 SQ
CIRC 34-9/16
INCH
INCH
INCH
Arc Length — Degree and Diameter Known
Find the arc length of an 85° portion of a circle with a 5-foot diameter:
KEYSTROKE
oo
5fC
85a
a
DISPLAY
0.
DIA 5 FEET 0 INCH
ARC 85.00°
ARC 3 FEET 8-1/2 INCH
Arc Length — Chord Length and Segment Rise Known
Find the arc length and radius of a circle with a 3-feet 6-inch chord
length and 1-foot 3-inch segment rise.
KEYSTROKE
DISPLAY
1. Enter the chord length of the segment as Run:
oo
0.
3f6iR
RUN 3 FEET 6 INCH
2. Enter the height of the segment as Rise:
1f3ir
3. Find the Radius:
Ç a (Radius)
RISE 1
RAD 1
FEET
3
INCH
10-3/16
INCH
FEET
(Cont’d)
USER’S GUIDE — 39
(Cont’d)
KEYSTROKE
DISPLAY
4. Find the Arc Angle:
a
5. Find the Arc Length:
a
ARC 142.15°
ARC 4
FEET
7-1/16
INCH
Arc Calculations — Arc Length and Diameter Known
Find the arc degree, chord length, segment rise, segment and pie
slice area, and segment rise, given a 5-foot diameter and an arc
length of 3 Feet 3 Inches:
KEYSTROKE
DISPLAY
1. Enter Circle diameter (Note: enter diameter into the C key):
oo
0.
5fC
DIA 5 FEET 0 INCH
2. Enter Arc length:
3f3ia
ARC 3
3. Find degree of Arc:
a
4. Find chord length:
a
FEET
3
INCH
ARC 74.48°
CORD 3
FEET
0-5/16
INCH
5. Find segment area:
a
SEG 1.051381
SQ FEET
6. Find pie slice area:
a
PIE 4.0625
SQ FEET
7. Find segment rise:
a
RISE 0
40 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
FEET
6-1/8
INCH
ARCHED SEGMENT WALLS
The arc function can also calculate the outside (default) and inside
lengths of arched walls. The outside arched wall lengths are measured outside of the arc (see diagram below). The inside arched wall
lengths are measured inside of the arc (see diagram on page 43).
Arched Segment Walls — Arched Windows (No Base)
Find the radius of an arched window with a chord length of 8 Feet 1
Inch and a rise of 2 Feet and 10-1/2 Inches. Then, find the arc
angle, arc length and segment area of the window. Then find the
“outside” arched segment wall lengths in order to frame the window.
KEYSTROKE
1. Enter chord length:
oo
8f1iR
2. Enter rise:
2f10i1/2r
3. Find Arc angle:
a
DISPLAY
0.
RUN 8
RISE 2
FEET
1
INCH
10-1/2
INCH
FEET
ARC 141.70°
4. Find Arc length:
a
ARC 10
FEET
7
INCH
5. Display chord length:
a
CORD 8
FEET
1
INCH
6. Find segment area:
a
SEG 16.96327
SQ INCH
7. Find pie slice area:
a
PIE 22.63527
SQ INCH
(Cont’d)
USER’S GUIDE — 41
(Cont’d)
KEYSTROKE
8. Display entered rise (segment height):
a
9. Display On-center spacing:
a
DISPLAY
RISE 2
FEET
OC
10-1/2
INCH
16
INCH
STORED
10. Find the arched segment wall lengths:
a
AW 1 0 FEET 2-9/16 INCH
a
AW 2 0 FEET 11-3/16 INCH
a
AW 3 2 FEET 9-1/8 INCH
Arched Segment Walls — Arched Windows (With Base)
Find the radius of an arched window with a chord length of 8 Feet
1 Inch, a rise of 2 Feet and 10-1/2 Inches and a base height of
2 Feet. Then, find the arc angle, arc length and segment area of the
window. Then find the “outside” arched segment wall lengths in
order to frame the window.
KEYSTROKE
1. Enter chord length:
oo
8f1iR
2. Enter rise:
2f10i1/2r
DISPLAY
0.
RUN 8
RISE 2
FEET
1
INCH
10-1/2
INCH
FEET
3. Enter base height (into Rake Wall function):
2fÇr
BASE 2 FEET 0 INCH
4. Find Arc angle:
a
ARC 141.70°
(Cont’d)
42 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
KEYSTROKE
DISPLAY
5. Find Arc length:
a
ARC 10
FEET
7
INCH
6. Display chord length:
a
CORD 8
FEET
1
INCH
7. Find segment area:
a
SEG 16.96327
SQ INCH
8. Find pie slice area:
a
PIE 22.63527
SQ INCH
9. Display entered rise (segment height):
a
RISE 2
10. Display On-center spacing:
a
FEET
OC
10-1/2
INCH
16
INCH
STORED
11. Find the arched segment wall lengths:
a
AW 1 2 FEET 2-9/16 INCH
a
AW 2 2 FEET 11-3/16 INCH
a
AW 3 4 FEET 9-1/8 INCH
Arched Segment Walls — Chord Length and
Segment Height Known
You’re building a circular or arched segment wall. Given a chord length of
15 Feet and a segment height of 5 Feet, find all arc values and “inside”
arched segment wall lengths. The On-center spacing is 16 Inches.
KEYSTROKE
DISPLAY
1. Change arched walls preference setting to “inside” Arc:
Çßßßßßß
AW outSidE
+
AW inSidE
o
0.
(Cont’d)
USER’S GUIDE — 43
(Cont’d)
KEYSTROKE
DISPLAY
2. Enter chord length and segment height (rise):
oo
0.
15fR
RUN 15 FEET 0 INCH
5fr
RISE 5 FEET 0 INCH
3. Find Arc angle:
a
ARC 134.76º
4. Find Arc length:
a
ARC 19
5. Display entered chord length:
a
FEET
CORD 15
1-5/16
INCH
0
INCH
FEET
6. Find segment area:
a
SEG 54.19722
SQ FEET
7. Find pie slice area:
a
PIE 77.63472
SQ FEET
8. Display entered segment height (rise):
a
RISE 5
0
INCH
16
INCH
AW 1 4 FEET 10-11/16
AW 2 4 FEET 6-5/8
AW 3 3 FEET 11-3/8
AW 4 3 FEET 0-1/16
AW 5 1 FEET 6-1/4
INCH
9. Display stored On-center spacing for the wall:
a
OC
10. Find arched segment wall lengths:
a
a
a
a
a*
FEET
STORED
INCH
INCH
INCH
INCH
11. Change arched walls preference setting back to “outside” Arc:
Çßßßßßß
AW inSidE
+
AW outSidE
o
0.
*Successive presses of a will toggle to the beginning.
44 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
COMPOUND MITER
Compound Miter Cuts
You’re installing crown moulding on the upper wall of your living
room. If the wall corner angle is 60° and the spring (crown) angle is
38°, find the miter angle and bevel angle cut.
KEYSTROKE
1. Store the spring angle:
oo
3 8 ß Â (Spring Angle)
DISPLAY
SPRG
STORED
0.
38.00°
2. Enter wall corner angle and calculate miter angle:
6 0 Â*
MITR 46.84°
3. Calculate bevel angle:
Â
BEVL 43.03°
4. Display stored spring angle:
Â
5. Display entered wall corner angle:
Â
SPRG
STORED
38.00°
CRNR 60.00°
*When a value less than 25 is entered as the wall corner angle, the compund miter
function assumes this is the number of sides of a polygon, calculates the wall corner
angle, and displays it first before displaying the miter angle.
USER’S GUIDE — 45
CONCRETE/PAVING
Volume of Concrete for a Driveway
Find the Cubic Yards of concrete required to pour a driveway with
the following dimensions: 36 Feet 3 Inches long by 11 Feet 6 Inches
wide by 4 Inches deep. If concrete costs $55 per Cubic Yard, what is
the total cost?
KEYSTROKE
DISPLAY
1. Multiply the length times the width to find the area:
oo
0.
36f3i
36 FEET 3 INCH
x11f6i
11 FEET 6 INCH
=
416.875 SQ FEET
2. Multiply times the depth to find the volume:
x4i=
5.146605
CU YD*
3. Multiply times the per Unit Cost to find the total cost of concrete:
x 5 5 Ç 0 (Cost)
$283.06
*This answer will automatically display in Cubic Yards due to the multiplication of
mixed units, unless the preference setting for volume display has been changed from
the default Standard Setting. (See Preference Settings on page 83.)
46 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Concrete Columns
Find the Cubic Yards of concrete required to pour five columns, if
each has a diameter of 3 Feet 4-1/2 Inches and a height of 11 Feet
6 Inches. If the concrete weighs 1.75 Tons per Cubic Yard, what is
the total weight in Tons? In Pounds? In Kilograms?
KEYSTROKE
1. Enter weight in Tons per Cubic Yard:
1 • 7 5 ß 0 (wt/vol)
2. Enter diameter and find Circle area:
oo
3f4i1/2
CC
DISPLAY
STORED
1.75
Ton Per CU YD
0.
3 FEET 4-1/2 INCH
AREA 8.946176 SQ FEET
3. Enter height and find total volume of concrete:
11f6ih
HGHT 11 FEET 6 INCH
Ç C (Column/Cone)
COL 102.881 CU FEET
Çy
3.810408 CU YD
x5=
19.05204 CU YD
4. Convert volume to weight in tons, pounds, and kilograms:
Ç 6 (tons)
33.34107 Ton
Ç 4 (lbs)
66682.14 LB
Ç 1 (kg)
30246.51 kG
For Trig Model (#4080) Users:
As this model does not have a h key, you must enter the height using the r key.
USER’S GUIDE — 47
Complex Concrete Volume
You’re going to pour an odd-shaped patio 4-1/2 Inches deep with the
dimensions shown below. Calculate the total area (by dividing the drawing into three rectangles) and determine the total Yards of concrete
required. Then, find the total cost, if concrete costs $45 per Cubic Yard.
KEYSTROKE
DISPLAY
1. Find area of Part “A” and store into Memory:
oo
0.
24f6i–
24 FEET 6 INCH
7f=
17 FEET 6 INCH
x27f=
472.5 SQ FEET
µ
M+ 472.5 SQ FEET M
2. Find area of Part “B” and store into Memory:
7f
x9f=
µ
63.
M+ 63.
3. Find area of Part “C” and store into Memory:
9f
x9f=
µ
81.
M+ 81.
7
FEET M
SQ FEET M
SQ FEET M
9 FEET M
SQ FEET M
SQ FEET M
(Cont’d)
48 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
KEYSTROKE
4. Find total area and clear Memory:
®®
5. Find total Cubic Yards:
x4i1/2=
DISPLAY
M+ 616.5
SQ FEET
8.5625
6. Find total cost:
x 4 5 Ç 0 (Cost)
CU YD
$385.31
Polygon, Finding Angles Based on Entered Radius and
Number of Sides
You’re going to pour a polygon-shaped patio. Find the polygon values
if the radius is 15 Feet and the number of sides is 6.
KEYSTROKE
DISPLAY
1. Enter radius and number of sides* to calculate the full angle:
oo
0.
1 5 f Ç a (Radius)
RAD 15 FEET 0 INCH
6 Ç R (Polygon)
FULL 120.00°
2. Then calculate the bi-sect angle, side length, perimeter, and
polygon area:
R
HALF 60.00°
R
SIDE 15 FEET 0 INCH
R
PER 90 FEET 0 INCH
R
AREA 584.5671 SQ FEET
*You must enter more than three sides for a multi-sided polygon figure or the calculator will display “None”.
USER’S GUIDE — 49
Concrete Footings (NOT AVAILABLE
ON TRIG MODEL
#4080)
Find the volume of concrete required for a 16-Inch by 8-Inch footing
that measures 232 Feet 6 Inches in length. Then find the volume of
five footings of the same size.
KEYSTROKE
DISPLAY
1. Calculate and store footing area:
oo
1 6 i x 8 i = ß 6 (Ftg Area)
0.
F-AR
2. Enter length and find footing volume:
2 3 2 f 6 i Ç W (Footing)
STORED
128.
SQ INCH
FTG 7.654321
CU YD
To find the volume of multiple footings of the same size, multiply
times the total number of footings:
3. Multiply by 5 footings to find total concrete volume:
x5=
38.2716 CU YD
4. Clear and return stored footing size to default:
Çx
50 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
ALL CLEArEd
Squaring-up a Foundation
A concrete foundation measures 45 Feet 6 Inches by 23 Feet
8 Inches. Find the diagonal measurement (square-up) to ensure
the form is perfectly square.
KEYSTROKE
1. Enter sides as rise/run:
oo
23f8ir
45f6iR
2. Find the square-up (diagonal):
d
DISPLAY
0.
RISE 23
RUN 45
DIAG 51
FEET
8
6
INCH
3-7/16
INCH
FEET
FEET
Alternative Method using l and W keys (NOT AVAILABLE
TRIG MODEL #4080):
1. Enter sides as length and width:
oo
23f8il
45f6iW
2. Find the square-up (diagonal):
WW
INCH
ON
0.
LNTH 23
WDTH 45
SQUP 51
FEET
8
6
INCH
3-7/16
INCH
FEET
FEET
INCH
USER’S GUIDE — 51
DRYWALL (NOT AVAILABLE
ON TRIG MODEL
#4080)
Number of Drywall Sheets for a Given Area
Find the number of 4 x 8, 4 x 9 and 4 x 12 sheets to cover an area
of 150 Square Feet.
KEYSTROKE
DISPLAY
1. Enter area:
oo
150ff
0.
150
SQ FEET
2. Find the number of 4 x 8 sheets, 4 x 9 sheets and 4 x 12 sheets
required:
Ç h (Drywall)
4X8 4.6875
(5 - 4 x 8 Sheets)
h
4X9 4.166667
(5 - 4 x 9 Sheets)
h
4X12 3.125
(4 - 4 x 12 Sheets)
h
150.
SQ FEET
Number of Drywall Sheets for a Given Length
Find the number of 4 x 8, 4 x 9 and 4 x 12 sheets to cover a length
of 40 Feet.
KEYSTROKE
1. Enter length:
oo
40f
DISPLAY
0.
40
FEET
2. Find the number of 4 x 8 sheets, 4 x 9 sheets and 4 x 12 sheets
required:
Ç h (Drywall)
4X8 10.*
h
4X9 10.*
h
4X12 10.*
h
LNTH 40 FEET 0 INCH
* It is the same amount for all three of the sheet sizes because the linear calculation
is based on the width of the sheets (e.g., 4 Feet).
Note: The order in which the different sheet size answers appear may differ from that
of the guide. The order is based on the last displayed sheet size when previously
calculated.
52 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
GRADE/SLOPE
Back-Fill on a Slope — Percent of Grade Known
You’ve built 55 linear Feet of a 3-foot high retaining wall that is 3 Feet
from the base of a 65% grade. You need to pour back-fill within
12 Inches of the top of the wall (for a 2 Foot depth). How many Cubic
Yards of fill should you have delivered?
KEYSTROKE
DISPLAY
1. Find volume for “A”:
oo
55f
x3f
x2f=µ
2. Find run of “B”:
65%p
2fr
R
3. Find volume of triangle “B”:
55f
x®R
x2f=
÷2=µ
4. Find total volume:
®®
Çy
0.
55
3
M+ 330.
FEET
FEET
CU FEET M
%GRD 65.
RISE 2 FEET 0 INCH
RUN 3 FEET 0-15/16 INCH
M
55 FEET
0-15/16 INCH
338.4615 CU FEET
M+ 169.2308 CU FEET
M
RUN 3
FEET
M
M
M
M
M
M+ 499.2308 CU FEET
18.49003 CU YD
USER’S GUIDE — 53
RIGHT TRIANGLE AND ROOF FRAMING EXAMPLES
54 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Roof Framing Definitions
Rise: The vertical distance measured from the wall’s top plate to the
top of the ridge.
Span: The horizontal distance or full width between the outside
edges of the wall’s top plates.
Run: The horizontal distance between the outside edge of the wall’s
top plate and the center of the ridge; in most cases this is equivalent
to half of the span.
Pitch: Pitch and slope are synonymous in modern trade language.
Pitch/slope of a roof is generally expressed in two types of measurement:
1) Ratio of unit rise to unit run* — 7/12 or 7 Inch
2) Angle of rafters, in degrees — 30.26°
*The unit rise is the number of Inches of rise per Foot (12 Inches) of unit run. The unit
run is expressed as one Foot (12 Inches).
Plate: The top horizontal wall member that the ceiling joist and
rafters sit on and fasten to.
Ridge: The uppermost point of two roof planes. This rafter is the
uppermost rafter that all Hip, Valley, Valley Jack and Common rafters
are fastened to.
Rafters: Rafters are inclined roof support members. Rafters include
the following types:
• Common Rafter: The Common connects the plate to the ridge
and is perpendicular to the ridge.
• Hip Rafter: The Hip rafter extends from the corner of two wall
plates to the ridge or King rafter at angle other than 90°. The Hip
rafter is an external angle of two planes.
• Valley Rafter: The Valley rafter extends from the corner of two
wall plates to the ridge or King rafter at angle other than 90°.
The Valley rafter is an internal angle of two planes.
• Jack Rafters: Rafters that connect the Hip or Valley rafter to the
wall plate.
• Irregular Hip/Valley Jacks: Jack rafters found in dual pitch or
“Irregular” roofs.
USER’S GUIDE — 55
Regular Roof: A standard roof where the Hips and/or Valleys run at
45° and have the same pitch/slope on both sides of the Hip and/or
Valley.
Irregular Roof: A non-standard roof where the Hips and/or Valleys
bisect two different pitches/slopes, or have “skewed wings” or irregular Jacks.
Rake Wall: A gable end wall that follows the pitch/slope of a roof.
Plumb: Vertical Cut. The angle of cut from the edge of the board
that allows the rafter to mate on the vertical side of the ridge rafter.
Level: Horizontal Cut. The angle of cut from the edge of the board
that allows the rafter to seat flat on the wall plate.
Cheek: Side Cut(s). The angle to cut from the SIDE of the Jack rafter to match up against the Hip or Valley rafter, usually made by tilting the blade from 90°. Jack rafters typically have one Cheek cut. If
there is only one pitch (no irregular pitch), the angle will be 45°. If
there are two pitches, each side will have a different Cheek cut for
the Jack rafter and the angles will total 90°.
Incremental Adjustment: The difference in rafter length from one
rafter to the next.
56 — Construction Master ® Pro / Trig / Desktop
Degree of Pitch
If the degree of pitch is 30.45°, what is the percent Grade, Slope
and Pitch in Inches?
KEYSTROKE
oo
30•45p
p
p
p
DISPLAY
0.
PTCH 30.45°
%GRD 58.78702
SLP 0.58787
PTCH 7-1/16 INCH
Note: To convert Pitch in Inches: Simply enter the Pitch in Inches first (e.g., 7 i p),
then continuously press the p key to calculate the pitch conversions, as above.
Percent Grade
If the Percent Grade is 47.25%, what is the Slope, Pitch in Inches,
and Degree of Pitch?
KEYSTROKE
oo
4 7 • 2 5 %* p
p
p
p
DISPLAY
0.
%GRD 47.25
SLP 0.4725
PTCH 5-11/16 INCH
PTCH 25.29°
*For entering Percent Grade, you need to label the value with the percent key.
Pitch Ratio or Slope
If the Pitch Ratio is 0.65, what is the Pitch in Inches, Degree of Pitch,
and Percent Grade?
KEYSTROKE
oo
• 6 5 Ç* p (Slope)
p
p
p
DISPLAY
0.
SLP 0.65
PTCH 7-13/16 INCH
PTCH 33.02°
%GRD 65.
*For entering Pitch Ratio, you must press the Ç key first.
USER’S GUIDE — 57
Common Rafter Length
If a roof has a 7/12 Pitch and a span of 14 Feet 4 Inches, what is
the point-to-point length of the Common rafter (excluding the overhang or ridge adjustment)? What are the Plumb and Level cuts?
Note: Run is half the Span.
KEYSTROKE
DISPLAY
1. Find diagonal or point-to-point length of the Common rafter:
oo
0.
7ip
PTCH 7 INCH
14f4i÷2=
7 FEET 2 INCH
R
RUN 7 FEET 2 INCH
d
DIAG 8 FEET 3-9/16 INCH
2. Find Plumb and Level cuts:
d
d
PLMB 30.26°
LEVL 59.74°
Note: The Common rafter calculation is the "point-to-point" length and does not
include the overhang or ridge adjustment.
Common Rafter Length — Pitch Unknown
Find the common rafter length for a roof with a rise of 6 Feet
11-1/2 Inches and a run of 14 Feet 6 Inches. Solve for the Pitch in
Degrees and in Inches.
KEYSTROKE
Find Diagonal and Pitch:
oo
6f11i1/2r
14f6iR
d
p
p
DISPLAY
0.
RISE 6 FEET 11-1/2 INCH
RUN 14 FEET 6 INCH
DIAG 16 FEET 1 INCH
PTCH 5-3/4 INCH
PTCH 25.64°
58 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Angle and Diagonal (Hypotenuse)
Find the Diagonal (Hypotenuse) and degree of angle of a right triangle that is 9 Feet high and 12 Feet long.
KEYSTROKE
1. Enter Rise and Run:
oo
9fr
12fR
DISPLAY
0.
RISE 9
RUN 12
FEET
FEET
0
0
INCH
INCH
2. Solve for Diagonal/Hypotenuse and Pitch in Inches and Degree of
Angle:
d
DIAG 15 FEET 0 INCH
p
PTCH 9 INCH
p
PTCH 36.87°
Rise
Find the Rise given a 7/12 Pitch and a Run of 11 Feet 6 Inches.
KEYSTROKE
oo
7ip
11f6iR
r
DISPLAY
0.
PTCH 7
RUN 11 FEET 6
RISE 6 FEET 8-1/2
INCH
INCH
INCH
Rise and Diagonal
Find the Rise and Diagonal of a right triangle given a 30° Pitch and
a run of 20 Feet 4 Inches.
KEYSTROKE
oo
30p
20f4iR
r
d
DISPLAY
0.
PTCH 30.00°
RUN 20 FEET 4 INCH
RISE 11 FEET 8-7/8 INCH
DIAG 23 FEET 5-3/4 INCH
USER’S GUIDE — 59
Sheathing Cut
You have framed an equal pitch roof and need to apply the roof
sheathing. Find the distance from the corner of the sheathing so that
you can finish the run at the Hip rafter and cut the material. The
pitch is 6 Inches and you are using 4-foot by 8-foot plywood, with
the 8-foot side along the plate.
KEYSTROKE
DISPLAY
1. Enter Pitch:
oo
6ip
2. Enter width of plywood:
4fd
3. Find length of sheathing:
R
0.
PTCH 6
DIAG 4
RUN 3
FEET
INCH
0
INCH
6-15/16
INCH
FEET
Regular Hip/Valley and Jack Rafters
You’re working with a 7/12 Pitch, and half your total span is 8 Feet
5 Inches:
(1) Find point-to-point length and cut angles for the common rafter;
(2) Find the length and cut angles of the adjoining Hip (or Valley) and;
(3) Find the Incremental Jack Adjustment, Regular Jack Rafter
lengths and cut angles (Jack Rafters at 16-Inch On-center
spacing).
KEYSTROKE
DISPLAY
1. Find Common rafter length and Plumb and Level cuts:
oo
0.
8f5iR
RUN 8 FEET 5 INCH
7ip
PTCH 7 INCH
d
DIAG 9 FEET 8-15/16 INCH
d
PLMB 30.26°
d
LEVL 59.74°
2. Find Hip/Valley rafter length and cut angles:
H
H/V 12 FEET 10-1/2 INCH
H
PLMB 22.42°
H
LEVL 67.58°
H
CHK1 45.00°
(Cont’d)
60 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
KEYSTROKE
DISPLAY
3. Find regular incremental Jack adjustment and regular Jack rafter
lengths and cut angles:
j
JKOC STORED 16 INCH*
j
INCR 1 FEET 6-1/2 INCH
j
JK 1 8 FEET 2-3/8 INCH
j
JK 2 6 FEET 7-7/8 INCH
j
JK 3 5 FEET 1-3/8 INCH
j
JK 4 3 FEET 6-13/16 INCH
j
JK 5 2 FEET 0-5/16 INCH
j
JK 6 0 FEET 5-13/16 INCH
j
JK 7 0 FEET 0 INCH
j
PLMB 30.26°
j
LEVL 59.74°
j
CHK1 45.00°
*If display does not read JKOC 16 INCH (the default), then reset On-center spacing
by pressing 1 6 i ß 5.
Jack Rafters — Using Other Than 16-Inch On-Center Spacing
A roof has a 9/12 Pitch and a run of 6 Feet 9 Inches. Find the incremental jack adjustment, jack rafter lengths and cut angles at 18-inch
(versus 16-inch) On-center spacing. The On-center spacing is used
for both Regular and Irregular Jack calculations.
KEYSTROKE
1. Enter Pitch, Run and spacing:
oo
9ip
6f9iR
1 8 i ß 5 (o.c.)
DISPLAY
0.
PTCH 9
RUN 6 FEET 9
OC STORED 18
INCH
INCH
INCH
2. Find regular incremental Jack adjustment and regular Jack rafter
lengths and cut angles:
j
JKOC STORED 18 INCH
j
INCR 1 FEET 10-1/2 INCH
j
JK 1 6 FEET 6-3/4 INCH
j
JK 2 4 FEET 8-1/4 INCH
j
JK 3 2 FEET 9-3/4 INCH
j
JK 4 0 FEET 11-1/4 INCH
j
JK 5 0 FEET 0 INCH
j
PLMB 36.87°
j
LEVL 53.13°
j
CHK1 45.00°
3. Reset On-center spacing to default 16-inch:
1 6 i ß 5 (o.c.)
OC
STORED
16
INCH
USER’S GUIDE — 61
Irregular Hip/Valley and Jack Rafters — Descending, with
On-Center Spacing Maintained
You’re working with a 7/12 Pitch and half your overall span is 4 Feet.
The irregular Pitch is 8/12, and 16-inch On-center spacing is maintained on both sides. Complete the following steps:
(1) Find the length of the common rafter;
(2) Reset calculator to 16-inch On-center spacing;
(3) Enter the Irregular Pitch; find the length of the adjoining
“Irregular” Hip (or Valley) and the cut angles;
(4) Find the incremental jack adjustment and the jack lengths on
the “Irregular” Pitch side (16-inch On-center spacing);
(5) Find the cut angles;
(6) Find the incremental jack adjustment and the jack lengths on
the “Regular” Pitch side (16-inch On-center spacing);
(7) Find the cut angles.
KEYSTROKE
1. Find Common rafter length:
oo
7ip
4fR
d
2. Enter On-center spacing:
1 6 i ß 5 (o.c.)
DISPLAY
0.
PTCH 7
RUN 4 FEET 0
DIAG 4 FEET 7-9/16
OC
STORED
16
INCH
INCH
INCH
INCH
3. Find Irregular Hip/Valley rafter length and cut angles:
8 i Ç H (Ir/Pitch)
IPCH 8 INCH
H
IH/V 5 FEET 9-11/16 INCH
H
PLMB 23.70°
H
LEVL 66.30°
H
CHK1 41.19°
H
CHK2 48.81°
(Cont’d)
62 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
KEYSTROKE
DISPLAY
4. Find irregular incremental jack adjustment and Irregular Jack
lengths:
Ç j (Ir/Jack)
IJOC STORED 16 INCH
j
INCR 1 FEET 4-13/16 INCH
j*
IJ 1 2 FEET 9-5/8 INCH
j
IJ 2 1 FEET 4-13/16 INCH
j
IJ 3 0 FEET 0 INCH
*It is not necessary to continue pressing Ç when displaying each Jack rafter size.
5. Find Irregular Jack plumb, level and cheek cut angles:
j
PLMB 33.69°
j
LEVL 56.31°
j
CHK1 41.19°
6. Find regular incremental jack adjustment and Regular Jack
lengths:
j
JKOC STORED 16 INCH
j
INCR 1 FEET 9-3/16 INCH
j
JK 1 2 FEET 10-3/8 INCH
j
JK 2 1 FEET 1-1/4 INCH
j
JK 3 0 FEET 0 INCH
7. Find Regular Jack plumb, level and cheek cut angles:
j
PLMB 30.26°
j
LEVL 59.74°
j
CHK1 48.81°
USER’S GUIDE — 63
Irregular Hip/Valley and Jack Rafters — Ascending, with Jacks
Mating at Hip/Valley
You’re working with a 7/12 Pitch and half your overall span is 4 Feet.
The Irregular Pitch is 8/12, and the Jacks need to mate at the Hip.
The maximum allowable On-center spacing is 16 Inches. Find the
Jack rafter sizes from smallest to largest (ascending order).
Complete the following steps:
(1) Set Preference display to “JK ASCEND” (Jack sizes in
ascending order);
(2) Set Preference display to “IRJK JAC-JAC” (Jacks mate);
(3) Find the length of the common rafter;
(4) Find the length of the adjoining “Irregular” Hip (or Valley) and
the cut angles;
(5) Find the o.c., incremental jack adjustment, Jack lengths and
cut angles on the “Irregular” pitched side;
(6) Find the o.c., incremental jack adjustment, Jack lengths and
cut angles on the “Regular” pitched side.
Note: After completing this example, you may need to reset the Preferences back to
“IRJK OC-OC” if you do not normally figure jacks in this manner. (See Preference
Settings on page 83.)
KEYSTROKE
DISPLAY
1. Review Preferences until you find “Jack Descend”:
oo
0.
Ç ß (Prefs)
FRAC 0-1/16 INCH
(If not at 1/16, press + until 1/16 is displayed)
ß
AREA Std.
ß
VOL Std.
ß
HDRM 6 FEET 8 INCH
ß
RAKE dESCEnd
ß
AW outSidE
ß
JACK dESCEnd
Set Preference to “Ascend”:
+ (plus sign)
JACK ASCEnd
2. Set Preference to “Jacks Mate”:
ß
+ (plus sign)
3. Find common rafter length:
7ip
4fR
d
IRJK OC-OC
IRJK JAC-JAC
PTCH 7
RUN 4 FEET 0
DIAG 4 FEET 7-9/16
INCH
INCH
INCH
(Cont’d)
64 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
KEYSTROKE
DISPLAY
4. Enter Irregular Pitch and find Irregular Hip/Valley rafter length and
cut angles:
8 i Ç H (Ir/Pitch)
IPCH 8 INCH
H
IH/V 5 FEET 9-11/16 INCH
H
PLMB 23.70°
H
LEVL 66.30°
H
CHK1 41.19°
H
CHK2 48.81°
5. Display the o.c. and find the irregular incremental jack adjustment
and Irregular Jack lengths and cut angles:
Ç j (Ir/Jack)
IJOC STORED 16 INCH*
j
INCR 1 FEET 4-13/16 INCH
j
IJ 1 1 FEET 4-13/16 INCH
j
IJ 2 2 FEET 9-5/8 INCH
j
IJ 3 4 FEET 2-1/2 INCH
j
PLMB 33.69°
j
LEVL 56.31°
j
CHK1 41.19°
6. Find the o.c., regular incremental jack adjustment and Regular
Jack lengths and cut angles:
j
JKOC 14 INCH*
j
INCR 1 FEET 6-1/2 INCH
j
JK 1 1 FEET 6-1/2 INCH
j
JK 2 3 FEET 1-1/16 INCH
j
JK 3 4 FEET 7-9/16 INCH
j
PLMB 30.26°
j
LEVL 59.74°
j
CHK1 48.81°
7. Reset jack rafter Preference Settings:
oo
0.
Çßßßßßßß
JACK ASCEnd
Set Preference to “Descend”:
+ (plus sign)
JACK dESCEnd
Set Preference to “Jacks On-Center”:
ß
IRJK JAC-JAC
+
IRJK OC-OC
Exit Preference Settings:
o
0.
*The stored On-center spacing is used as the maximum allowable spacing. Therefore,
it is assigned to the side with the largest entered pitch. In this example, the “Irregular”
side pitch is larger than the “Regular” side pitch; thus, the Irregular side is calculated
using the maximum On-center value (16 Inches). If the Regular pitch side had the
larger pitch, it would require the larger (16 Inches) On-center.
USER’S GUIDE — 65
Rake-Wall – No Base
Find each stud size in a Rake-Wall with a peak (rise) of 4 Feet, and
a length (run) of 8 Feet. Use 16 Inches as your spacing.
Note: The wall has no base.
KEYSTROKE
DISPLAY
1. Enter Rise and Run and display o.c. spacing:
oo
0.
4fr
RISE 4 FEET 0 INCH
8fR
RUN 8 FEET 0 INCH
® 5*
OC STORED 16 INCH
*If 16-inch is not displayed, enter 1 6 i ß 5.
2. Find stud lengths:
Ç r (R/Wall)
r
r
r
r
r
r
RWOC STORED 16
RW 1 3 FEET 4
RW 2 2 FEET 8
RW 3 2 FEET 0
RW 4 1 FEET 4
RW 5 0 FEET 8
BASE 0 FEET 0
3. Find Rake-Wall angle of incline:
r
INCH
INCH
INCH
INCH
INCH
INCH
INCH
RW 26.57°
Note: By setting the Rake “Ascend” Preference (see Preference Settings on page
83), you may view Rake-Wall stud lengths from smallest to largest size.
Note: You can also solve if you only know the Rise and Pitch, Run and Pitch, or
Diagonal and Pitch. Simply enter the known values via p, r, R, or d keys,
similar to Step #1 above, then solve for Rake-Wall stud lengths, as seen in Step #2.
66 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Rake-Wall – With Base
Find each stud size in a rake-wall with a peak (rise) of 4 Feet, a
length (run) of 8 Feet, and a base of 5 Feet. Use 16 Inches as your
On-center spacing.
KEYSTROKE
1. Enter Rise, Run, and o.c. spacing:
oo
4fr
8fR
® 5*
DISPLAY
0.
RISE 4 FEET 0
RUN 8 FEET 0
OC STORED 16
INCH
INCH
INCH
*If 16-inch is not displayed, enter 1 6 i ß 5.
2. Enter base, then find stud lengths and angle of incline:
5 f Ç r (R/Wall)
BASE 5 FEET 0 INCH
r
RWOC STORED 16 INCH
r
RW 1 8 FEET 4 INCH
r
RW 2 7 FEET 8 INCH
r
RW 3 7 FEET 0 INCH
r
RW 4 6 FEET 4 INCH
r
RW 5 5 FEET 8 INCH
r
BASE 5 FEET 0 INCH
r
RW 26.57°
USER’S GUIDE — 67
ROOFING MATERIALS
The Roof function solves for the amount of bundles and squares for
standard gable-end style roofs. Bundles are based on a coverage area
of 33.33 Square Feet, and squares are based on 100 Square Feet.
Roof Covering — Entering Pitch, Length and Width
Find the roof area and number of roofing squares, number of bundles
and 4 x 8 sheets required for a 10-inch Pitch roof covering a floor
area of 14 Feet by 11 Feet. Also calculate the plan area.
KEYSTROKE
1. Enter Pitch and floor area*:
oo
10ip
14fl
11fW
2. Find roof area:
Ç d (Roof)
DISPLAY
0.
PTCH 10
LNTH 14 FEET 0
WDTH 11 FEET 0
ROOF 200.4631
INCH
INCH
INCH
SQ FEET
3. Find number of roofing squares:
d
SQRS 2.00
4. Find number of bundles:
d
BNDL 6.01
5. Display bundle size/area:
d
B-SZ 33.33
6. Find number of 4 x 8 sheets:
d
7. Display stored Pitch:
d
8. Find floor/plan area:
d
SQ FEET
4X8 6.26
PTCH
STORED
PLAN 154.
10
INCH
SQ FEET
*If you know the area (and do not need to calculate it), once you have entered the
Pitch, enter the area and label it as Square Feet, then press Ç d. For example, if
the plan/floor area is 100 Square Feet, enter 1 0 0 f f Ç d.
For Trig Model (#4080) Users:
As this model does not have l and W keys, you must calculate area the standard way (e.g., L x W, or entering 154 Square Feet), then press Ç d.
68 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Roof Covering — Entering Rise, Run (No Pitch) and Area
Find the roof covering, Pitch and plan area if the Rise is 10 feet and
Run is 15 Feet. The length of the floor area is 50 Feet and the width is
30 Feet.
KEYSTROKE
1. Enter Rise, Run, length and width:
oo
10fr
15fR
50fl
30fW
DISPLAY
0.
RISE
RUN
LNTH
WDTH
10
15
50
30
FEET
FEET
FEET
FEET
0
0
0
0
INCH
INCH
INCH
INCH
2. Find roof area, number of roofing squares, number of bundles,
stored bundle size, number of 4 x 8 sheets, Pitch and plan area:
Ç d (Roof)
ROOF 1082.776 SQ FEET
d
SQRS 18.03
d
BNDL 54.08
d
B-SZ 33.33 SQ FEET
d
4X8 56.34
d
PTCH STORED 8 INCH
d
PLAN 1500. SQ FEET
For Trig Model (#4080) Users:
As this model does not have l and W keys, you must calculate area the standard way (e.g., L x W, or entering 200 Square Feet), then press Ç d.
USER’S GUIDE — 69
STAIR LAYOUT EXAMPLES
Stair Layout Definitions
Rise: The “floor-to-floor” or “landing-to-landing” rise is the actual vertical rise required for building a stairway after the finish flooring has
been installed.
Run: The run of a stairway is the amount of horizontal space
required. The total run of a stairway is equal to the width of each
tread multiplied by the number of treads.
Desired Riser Height: The desired riser height is the amount of
vertical rise you allow for each individual riser in the stairway. This
is sometimes dictated by local code.
Actual Riser Height: The actual height of each riser is measured
from the top of one tread to the top of the next tread.
70 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Number of Risers: The number of risers includes both the first and
the last riser of the stairway.
Riser Overage or Underage: The riser overage or underage is the
difference between the “floor-to-floor” rise and the total height of all
of the risers. Many times the riser height does not divide evenly into
the floor-to-floor rise and a small fraction of an inch is left over. A
positive remainder is an overage, while a negative remainder is an
underage.
Tread Width: The width of each tread is measured from the front of
one riser to the front of the next riser. The width of each tread does
NOT include the nosing or overhang of the tread. The nosing or
overhang of a tread is the rounded front of the tread that projects
beyond the face of the riser.
Number of Treads: The number of treads is one less than the
number of risers.
Tread Overage or Underage: The tread overage or underage is the
difference between the run or horizontal space that a stairway must
fit into and the total width of the treads. Similar to the riser
overage/underage, many times the total width of the treads does not
divide evenly into the run or horizontal space for the stairway and a
small fraction of an inch is left over. A positive remainder is an overage, a negative remainder is an underage.
Stringers: Also called carriages, stair horses or stair jacks. Stringers
are the diagonal members that support the treads and risers.
Angle of Incline: The angle of incline of the stairway is determined
by the rise and run of each stair. The angle of incline should not be
confused with the pitch of the stairway. The pitch of a stairway is the
angle based on the floor-to-floor rise and the horizontal run of the
stairway. The angle of incline is based on the “actual” riser height
and the “actual” tread width of the stair.
Stairwell Opening: The length of the opening at the top of the
stairs. The computation is based on the headroom height (the
desired spacing between the stairs and upper floor ceiling) and
thickness of the upper floor where the opening is located.
USER’S GUIDE — 71
Stairs — Given Only Floor-to-Floor Rise
You’re building a stairway with a total rise of 9 Feet 11 Inches. Your
desired riser height is 7-1/2 Inches and desired tread width is
10 Inches. The desired headroom is 6 Feet 8 Inches and floor thickness 10 Inches*. Find all stair values, then calculate the run.
*Headroom and floor thickness are required to calculate the length of the stairwell
opening.
KEYSTROKE
1. Enter known Rise:
oo
9f11ir
2. Recall stored desired stair riser height:
®7
DISPLAY
0.
RISE 9
R-HT
11
INCH
7-1/2
INCH
FEET
STORED
3. Recall stored desired stair tread width:
®9
T-WD
STORED
10
INCH
4. Recall stored desired floor thickness:
®8
FLOR
STORED
10
INCH
5. Display stored Headroom (via Preference Setting Mode):
Çßßßß
HDRM 6 FEET 8 INCH
6. Find riser height, number of risers, riser underage/overage, tread
width, number of treads, tread overage/underage, length of stairwell
opening, stringer length and angle of incline. As a final step, calculate the run.
s
R-HT 7-7/16 INCH
s
RSRS 16.
s
R+/– 0 INCH
s
T-WD STORED 10 INCH
s
TRDS 15.
s
T+/– 0 INCH
s
OPEN 10 FEET 1 INCH
s
STRG 15 FEET 6-15/16 INCH
s
INCL 36.64°
s
RUN 12 FEET 6 INCH
s*
RISE STORED 9 FEET 11 INCH
*Continuous presses of s will also recall stored desired riser height, tread, headroom and floor thickness values.
72 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Notes on Changing Stored Stair Variables:
To Change Desired Riser Height: If you wish to use a Desired
Riser Height of other than 7-1/2 Inches (the calculator’s default),
simply enter a new value. For example, to enter 8 Inches, enter
8 i ß 7. Press ® 7 to review your new entry. This value
will be permanently stored until you change it.
To Change Desired Tread Width: If you wish to use a Desired
Tread Width of other than 10 Inches (the calculator’s default), simply
enter a new value. For example, to enter 10-1/2 Inches, enter
1 0 i 1 / 2 ß 9. Press ® 9 to review your new entry.
This value will be permanently stored until you change it.
To Change Desired Floor Thickness: If you wish to use a Desired
Floor Thickness of other than 10 Inches (the calculator’s default),
simply enter a new value. For example, to enter 12 Inches, enter
1 2 i ß 8. Press ® 8 to review your new entry. This
value will be permanently stored until you change it.
To Change Desired Headroom: If you wish to use a Desired
Headroom other than 6 Feet 8 Inches (the calculator’s default),
simply select a new value via the Preference Mode and use the +
or – keys to increase/decrease by one inch. See examples below.
This value will be permanently stored until you change it.
KEYSTROKE
DISPLAY
1. Select Headroom via Preference Mode:
oo
Çßßßß
HDRM 6
FEET
8
INCH
2. Decrease Headroom Height by 2 Inches:
––
HDRM 6
FEET
6
INCH
0.
3. Then increase Headroom Height by 4 Inches:
++++
HDRM 6 FEET 10 INCH
4. Return Headroom Height to default of 6 Feet 8 Inches:
––
HDRM 6 FEET 8 INCH
USER’S GUIDE — 73
Stairs — Given Only the Run
You’re building a stairway with a total run of 20 Feet. Your desired
riser height is 7-1/2 Inches and desired tread width is 10 Inches. The
desired headroom is 6 Feet 8 Inches and floor thickness 10 Inches.
Find all stair values, then calculate the rise.
KEYSTROKE
1. Enter run:
oo
20fR
DISPLAY
0.
RUN 20
FEET
0
INCH
2. Find riser height, number of risers, riser underage/overage, tread
width, number of treads, tread overage/underage, stairwell opening,
stringer length and angle of incline. As a final step, calculate the rise.
s
R-HT STORED 7-1/2 INCH
s
RSRS 25.
s
R+/– 0 INCH
s
T-WD 10 INCH
s
TRDS 24.
s
T+/– 0 INCH
s
OPEN 10 FEET 0 INCH
s
STRG 25 FEET 0 INCH
s
INCL 36.87°
s
RUN STORED 20 FEET 0 INCH
s
RISE 15 FEET 7-1/2 INCH
74 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Stairs — Given Rise and Run
You need to build a stairway with a floor-to-floor height of 10 Feet
1 Inch, a run of 15 Feet 5 Inches, and a nominal desired riser height
of 7-1/2 Inches (default). Calculate all stair values.
KEYSTROKE
1. Enter Rise and Run:
oo
10f1ir
15f5iR
2. Find Stair values:
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
DISPLAY
0.
RISE 10
RUN 15
FEET
FEET
1
5
INCH
INCH
R-HT
7-9/16 INCH*
RSRS 16.
R+/– 0 INCH
T-WD 12-5/16 INCH
TRDS 15.
T+/– – 0-5/16 INCH
OPEN 12 FEET 2-1/2 INCH
STRG 18 FEET 0-3/4 INCH
INCL 31.56°
RUN STORED 15 FEET 5 INCH
RISE STORED 10 FEET 1 INCH
R-HT STORED 7-1/2 INCH
T-WD STORED 10 INCH
HDRM STORED 6 FEET 8 INCH
FLOR STORED 10 INCH
*A
in the display means that the calculated riser height exceeds the stored
desired riser height.
USER’S GUIDE — 75
Stairs — Given Rise and Run, Using “Riser Limited” Function
for Code Restrictions
Your local code prohibits risers greater than 7-1/2 Inches. You need
to build a stairway with a floor-to-floor height of 10 Feet 1 Inch, a run
of 15 Feet 5 Inches. Calculate all stair values. Use the “Riser
Limited” function (second function of the s key) to calculate a
riser height that does not exceed the stored Desired Riser Height of
7-1/2 Inches.
KEYSTROKE
1. Enter Rise and Run:
oo
10f1ir
15f5iR
DISPLAY
0.
RISE 10
RUN 15
FEET
FEET
1
5
INCH
INCH
2. Find stair values using “Riser Limited”:
Ç s (Riser Limited)
R-HT 7-1/8 INCH
s
RSRS 17.
s
R+/– 1/8 INCH
s
T-WD 11-9/16 INCH
s
TRDS 16.
s
T+/– 0 INCH
s
OPEN 12 FEET 2-1/16 INCH
s
STRG 18 FEET 1-5/16 INCH
s
INCL 31.64°
s
RUN STORED 15 FEET 5 INCH
s
RISE STORED 10 FEET 1 INCH
s
R-HT STORED 7-1/2 INCH
s
T-WD STORED 10 INCH
s
HDRM STORED 6 FEET 8 INCH
s
FLOR STORED 10 INCH
76 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Baluster Spacing
You are going to install a handrail at the top of a balcony. Your total
span is 156 Inches and you would like the space between the balusters to be about 4 Inches. If each baluster is 1-1/2 Inches wide, what
is the exact spacing between each baluster?
KEYSTROKE
1. Estimate number of balusters in span.
oo
156i÷
5 i 1 / 2 =*
DISPLAY
0.
156 INCH
28.36364
(28 balusters)
*Desired spacing plus baluster width (4” plus 1-1/2”).
2. Find total space ‘occupied’ by the balusters by multiplying the
width of each baluster by the rounded number of balusters (found
above):
1i1/2x
1-1/2 INCH
28=
42 INCH
3. Find total space between all balusters:
156i–
42i=
156
114
INCH
INCH
4. Find actual baluster spacing by dividing total space between all
balusters by the number of spaces between the balusters (number
of balusters plus one equals 29):
114i÷
114 INCH
29=
3-15/16 INCH
USER’S GUIDE — 77
STUDS
Find the number of 16-inch On-center studs needed for a wall with a
length of 18 Feet 7-1/2 Inches.
KEYSTROKE
DISPLAY
1. Enter length and convert to Studs*.
oo
18f7i1/2
Ç 5 (Studs)
18
0.
7-1/2 INCH
STUD 15.
(studs)
FEET
*The length is divided by the On-center spacing; in this case, 16 Inches (default setting). Press ® 5 to review the stored On-center value. If you need to enter a new
On-center, for example 18 Inches, enter 1 8 i ß 5.
BASIC D:M:S AND TRIGONOMETRY EXAMPLES
Converting Degrees:Minutes:Seconds
Convert 23° 42’ 39” to decimal degrees:
KEYSTROKE
DISPLAY
oo
23•42•39
Ç • (dms
deg)
0.
DMS 23.42.39
23.71°
Convert 44.29° to degrees:minutes:seconds format:
KEYSTROKE
oo
4 4 • 2 9 Ç • (dms
DISPLAY
deg)
0.
DMS 44.17.24
Note: Improperly formatted entries will be redisplayed in the correct convention after
any operator key is pressed. For example, 30° 89’ entered will be corrected and displayed at 31° 29’ 0” or 31.48333°.
Time Calculations Using D:M:S
Add 7 Hours 45 Minutes 33 Seconds to 11 Hours 16 Minutes
20 Seconds:
KEYSTROKE
oo
7•45•33
+11•16•20=
78 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
DISPLAY
0.
DMS 7.45.33
DMS 19.01.53
TRIGONOMETRIC FUNCTIONS
Trigonometric functions are available on the Construction Master
Pro Trig and Construction Master Pro Desktop calculators.
The drawing and formulas below list basic trigonometric formulas, for
your reference:
Given side A and angle a, find:
Side C
A÷aç =
(e.g., 3 f ÷ 5 3 • 1 3 ç =)
Side B
Axat =
Angle b
90° – a =
Given side A and angle b, find:
Side B
A÷bt =
Side C
A÷bS =
Angle a
90° – b =
Given side B and angle a, find:
Side A
B÷at=
Side C
B÷aS=
Given side C and angle a, find:
Side A
Cxaç=
Side B
CxaS=
Given side A and side C, find:
Angle a
A÷C= Ç ç
Angle b
A÷C= Ç S
Given side B and angle b, find:
Side C
B÷bç=
Side A
Bxbt=
USER’S GUIDE — 79
Converting Percent Grade to D:M:S
You are grading a piece of property and the site plans call for an
embankment with a grade “no steeper than 35%.” Your level shows
the slope at an 18° 15’ angle. Will this pass?
KEYSTROKE
DISPLAY
Enter grade and convert to degrees:minutes:seconds:
oo
0.
3 5 % Ç t Ç • (dms
deg)
DMS 19.17.24
Since your level reading of 18° 15’ is less steep than 19° 17’ 24”, the
slope will pass inspection.
Converting Tangent/Pitch to Angle
Find the angle and corresponding tangent for a roof with an 8/12 Pitch.
KEYSTROKE
DISPLAY
1. Enter pitch:
oo
8ip
PTCH 8
2. Convert Pitch to degrees:
p
PTCH 33.69°
0.
3. Find Tangent or Slope:
t
INCH
0.666667
Converting Roof Angle in Degrees to Pitch in Inches
Convert a roof angle of 30.25° to Pitch in Inches.
KEYSTROKE
DISPLAY
1. Enter angle:
oo
30•25t
0.
0.583183
2. Convert to Pitch:
Ç p (Slope)
p
SLP 0.583183
PTCH 7 INCH
80 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Angle — Rise and Hypotenuse Known
Find the angle that connects the rise and hypotenuse of a right triangle,
if the rise is 6 Feet and the hypotenuse is 10 Feet in length.
KEYSTROKE
DISPLAY
1. Use trigonometric formula (divide the rise by the hypotenuse):
oo
0.
6f÷10f=
0.6
2. Solve for degrees:minutes:seconds or angle:
Ç ç (cos -1)
Ç • (dms
deg)
53.13°
DMS 53.07.48
USER’S GUIDE — 81
APPENDIX A — DEFAULT SETTINGS
After a Clear All (Ç x), your calculator will return to the following
settings:
STORED VALUES
DEFAULT VALUE
Desired Riser Height
Desired Tread Width
Floor Height
On-center Spacing
Weight per Volume
Block Area (except Trig model)
Block Length (except Trig model)
Footing Area (except Trig model)
Spring (Crown) Angle
7-1/2 INCH
10 INCH
10 INCH
16 INCH
1.5 Ton Per CU
128. SQ INCH
16 INCH
264. SQ INCH
45.00°
YD
If you replace your batteries or perform a Full Reset* (press O, hold
down x, and press o), your calculator will return to the following
settings (in addition to those listed above):
PREFERENCE SETTINGS
DEFAULT VALUE
Fractional Resolution
Area Display
Volume Display
Stairway Headroom
Rake Wall
Arched Wall
Jack Rafters
Irregular Jack Spacing
Exponent
Meter Linear Display
Decimal Degree Display
Fractional Mode
1/16
Standard
Standard
6 Feet 8 Inch
Descending
Outside
Descending
OC-OC
Off
0.000
0.00°
Standard
*Depressing the Reset button located above the p key (below the Ç key on the
Desktop model) will also perform a Full Reset.
82 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
APPENDIX B — PREFERENCE SETTINGS
The Construction Master Pro calculators have Preference Settings
that allow you to customize or set desired dimensional formats and
calculations. The options vary per model.
If you replace your batteries or perform a Full Reset* (press O, hold
down x, and press o), your calculator will return to the following
settings (in addition to those listed on the previous page):
*Depressing the Reset button located above the p key (below the Ç key on the
Desktop model) will also perform a Full Reset.
PREFERENCE
OPTIONS
1) Fractional Resolution
– *1/16 (displays fractional values to the
nearest 16th of an Inch)
– 1/32
– 1/64
– 1/2
– 1/4
– 1/8
2) Area Display Format
– *Standard (if units entered are the
same—e.g., Feet x Feet—the answer
will remain in this format (Square Feet),
but if units entered are different — e.g.,
Inches x Feet—area answer will be displayed in Square Feet)
– Square Feet (area answers always
displayed in Square Feet, regardless of
unit entry — e.g., Inches x Inches =
Square Feet)
– Square Yards (area answers always
displayed in Square Yards — e.g.,
Feet x Feet = Square Yards)
– Square Meters (area answers always
displayed in Square Meters — e.g.,
Feet x Feet = Square Meters)
Note: To check the current Fractional Resolution, press ® /. Either “Std” (standard
fractional resolution) or “Cnst” (constant) will be displayed, along with the fractional
resolution).
(Cont’d)
USER’S GUIDE — 83
(Cont’d)
PREFERENCE
OPTIONS
3) Volume Display Format
– *Standard (if units entered are the
same — e.g., Feet x Feet x Feet — the
answer will remain in this format (cu. ft),
but if units entered are different — e.g.,
Feet x Feet x Inches — vol. answer will
always be displayed in Cubic Yards)
– Cubic Yards (vol. answers always
displayed in Cubic Yards, regardless of
unit entry — e.g., Feet x Feet x Feet =
Cubic Yards)
– Cubic Feet (vol. answers always displayed in Cubic Feet, regardless of unit
entry — e.g., Inches x Inches x Inches =
Cubic Feet)
– Cubic Meters (vol. answers always
displayed in Cubic Meters, regardless of
unit entry — e.g., Feet x Feet x Feet =
Cubic Meters)
4) Stairwell—Headroom
Height
– *6 Feet 8 Inch (default)
– Use + or – key to increase or
decrease above value by 1 Inch
5) Rake-Wall Descending
or Ascending
– *Descending (Rake-Wall studs are
displayed from largest to smallest size)
– Ascending (Rake-Wall studs are
displayed from smallest to largest size)
6) Arched Wall Outside
or Inside
– *Outside (Arched walls are calculated
for outside of the arc)
– Inside (Arched walls are calculated
for inside of the arc)
7) Jack Rafters Descending – *Descending (Jack rafters are
or Ascending
displayed from largest to smallest size)
– Ascending (Jack rafters are displayed
from smallest to largest size)
(Cont’d)
84 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
PREFERENCE
OPTIONS
8) Irregular Jack Rafters
O-C or Mate
– *OC-OC (On-center spacing maintained
on both regular and irregular sides)
– JAC-JAC (regular/irregular Jack rafters
“mate” at the hip/valley, e.g., On-center
spacing not maintained on both sides)
9) Exponent Off or On
– *Off (Exponential Mode is Off; turns
on Auto-ranging; e.g., if display can’t
show seven digits, will display in next
largest unit).
– On (Exponential Mode is On)
10) Meter Linear Display
– *0.000 (linear Meter answers are
always displayed to third decimal place)
– FLOAt (linear Meter answers are
displayed to the maximum number of
decimal places — e.g., 1.234 M + 2.56 M
= 3.794 M)
11) Decimal Degree
Display
– *0.00°
– FLOAt
12) Fractional Mode
– *Standard (fractions are displayed to
the nearest fraction)
– Constant (fractions are displayed in
the set fractional resolution)
USER’S GUIDE — 85
How to Set Preferences
The following sections detail Preference Setting options for the
Construction Master Pro calculators.
Enter the Preference Mode by pressing Ç ß (Prefs). Access
each category by pressing the ß key until you reach the desired
setting. Within each category, press the + or – keys to toggle
between individual selections. Press o to exit and set your
Preference.
Note: Press + to advance and press – to back up. Pressing the ß key continuously
in this mode will cycle through all of the Preference Settings.
You may change these settings at any time by repeating the above,
and setting in a new preference.
To reset preferences back to factory default settings, turn your calculator off, hold down the x key and turn the calculator back on.
For example, if you wish to display all your dimensional area answers
in square meters, press Ç ß ß (Area Std), then the + key
until “AREA 0. SQ M” is displayed. Simply exit this mode by pressing
o or any key, except + or ß, and all your future area answers
will be displayed in square meters.
Accessing Preference Settings
KEYSTROKE
To Set “Fractional Resolution”:
Ç ß (Prefs) (1st press of ß)
+ (plus sign)
+
+
+
+
+ (repeats options)
DISPLAY
FRAC 0-1/16
FRAC 0-1/32
FRAC 0-1/64
FRAC 0-1/2
FRAC 0-1/4
FRAC 0-1/8
FRAC 0-1/16
To Set “Area” Answer Format:
ß (2nd press of ß)
+ (plus sign)
+
+
+ (repeats options)
INCH
INCH
INCH
INCH
INCH
INCH
INCH
AREA Std.
AREA 0. SQ FEET
AREA 0. SQ YD
AREA 0. SQ M
AREA Std.
(Cont’d)
86 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
(Cont’d)
KEYSTROKE
To Set “Volume” Answer Format:
ß (3rd press of ß)
+ (plus sign)
+
+
+ (repeats options)
DISPLAY
VOL Std.
VOL 0. CU YD
VOL 0. CU FEET
VOL 0. CU M
VOL Std.
To Increase or Decrease Stairwell “Headroom” from Default of 6’8”:
ß (4th press of ß)
HDRM 6 FEET 8 INCH
+* (plus sign increases height by 1 Inch)
HDRM 6 FEET 9 INCH
–* (minus sign decreases height by 1 Inch) HDRM 6 FEET 8 INCH
*Keep pressing + or – to increase or decrease an Inch at a time.
To Set Rake-Wall Stud Sizes to “Descending” or “Ascending”:
ß (5th press of ß)
RAKE dESCEnd
+ (plus sign)
RAKE ASCEnd
+ (repeats options)
RAKE dESCEnd
To Set Arched Wall Calculations to “Outside” or “Inside”:
ß (6th press of ß)
AW outSidE
+ (plus sign)
AW inSidE
+ (repeats options)
AW outSidE
To Set Jack Rafter to “Descending” or “Ascending”:
ß (7th press of ß)
JACK dESCEnd
+ (plus sign)
JACK ASCEnd
+ (repeats options)
JACK dESCEnd
To Set Irregular Jack Spacing to “On-Center” or “Mate”:
ß (8th press of ß)
IRJK OC-OC
+ (plus sign)
IRJK JAC-JAC
+ (repeats options)
IRJK OC-OC
To Set “Exponential Mode” On or Off:
ß (9th press of ß)
+ (plus sign)
+ (repeats options)
EXP OFF
EXP On
EXP OFF
(Cont’d)
USER’S GUIDE — 87
(Cont’d)
KEYSTROKE
To Set “Meter” Linear Decimal Format:
ß (10th press of ß)
+ (plus sign)
+ (repeats options)
DISPLAY
METR 0.000
METR FLOAt
METR 0.000
M
M
M
To Set “Number of Decimal Places for Degree Displays”:
ß (11th press of ß)
DEG 0.00°
+ (plus sign)
DEG FLOAt
+ (repeats options)
DEG 0.00°
To Set Fractional Mode to “Standard” or “Constant”:
ß (12th press of ß)
+ (plus sign)
+ (repeats options)
Note: Press o at any time to exit the Preference Mode.
88 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Std.
COnSt
Std.
APPENDIX C — CARE INSTRUCTIONS
Please follow the guidelines listed in this section for proper care and
operation of your calculator. Not following the instructions listed
below may result in damage not covered by your warranty. Refer to
the Repair and Return section on page 95 for more details.
Do not expose calculator to temperatures outside the operating
temperature range of 32ºF – 104ºF (0ºC – 40ºC).
Do not expose calculator to high moisture such as submersion
in water, heavy rain, etc.
USER’S GUIDE — 89
APPENDIX D — IMPORTANT NOTES FOR OWNERS
OF PREVIOUS CONSTRUCTION MASTERS
The Construction Master Pro Workbook and Study Guide has been
written with keystroke examples, illustrations and solutions using
Construction Master Pro v3.1. If you are using a Construction Master
Pro v3.0 it is important to understand the changes or enhancements
to the v 3.1 edition. The version number you are using appears next
to the model number 4065 on the left side of the face of the calculator.
You can also refer to your User’s Guide for more information on any of
the following functions.
NEW/ENHANCED FUNCTION
DESCRIPTION
Accumulative Memory (M+)
– Now also displays the average and the
count upon repeated key presses of µ.
Arc and Circle Calculations
– Arc and Circle values can now be solved by
entering any two of the following values: Arc
Length/Angle, Diameter/Radius, Chord Length,
and Segment Rise.
Arched Segment Walls
– Now calculates the segment walls outside
the arc (including a base, if needed), or calculates the arched segment walls inside the
arc, depending upon preference setting.
Blocks Function
– Now solves for blocks based on values
stored in l only or in l and h.
Compound Miter
– Now calculates the Miter and Bevel angles
using the spring (crown) angle (this is the
angle of the crown molding to the wall; previous version 3.0 used the angle of the crown
molding to the ceiling).
Column/Cone Function
– Column/Cone Height is now entered using
the h key instead of the r key
(excludes Model #4080).
Footing Function
– Default footing area is now 264 Square
Inches (instead of 1.8 Square Feet).
Height
– Displays Volume, Wall Area, and Room
Area only (excludes display of Area, SquareUp, and Perimeter, which are displayed in
the Width function).
Jack Rafters
– Now displays the incremental adjustment,
which is the difference in rafter length from
one rafter to the next.
90 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
APPENDIX E — ACCURACY/ERRORS,
AUTO SHUT-OFF, BATTERIES, RESET
ACCURACY/ERRORS
Accuracy/Display Capacity — Your calculator has a twelve-digit
display made up of eight digits (normal display) and four fractional
digits. You may enter or calculate values up to 19,999,999.99. Each
calculation is carried out internally to twelve digits.
Errors — When an incorrect entry is made, or the answer is beyond
the range of the calculator, it will display the word “ERROR.” To clear
an error condition you must hit the o button once. At this point
you must determine what caused the error and re-key the problem.
Error Codes
DISPLAY
ERROR TYPE
OFLO
MATH Error
DIM Error
ENT Error
TRIG Error
None
Overflow (too large)
Divide by 0
Dimension error
Invalid entry error
Trig. error (for example, tan of 1 foot)
Attempt to calculate stairs without entering rise and run
Auto-Range — If an “overflow” is created because of an input and
calculation with small units that are out of the standard seven-digit
range of the display, the answer will be automatically expressed in
the next larger units (instead of showing “ERROR”) — e.g.,
20,000,000 mm is shown as 20,000 m. Also applies to inches, feet
and yards.
Note: If Exponential Notation is activated through the Preference Setting, the value
will be shown in scientific notation (e.g., 20 million mm—2.00000 07 mm).
AUTO SHUT-OFF
Your calculator is designed to shut itself off after about 8-12 minutes
of non-use.
USER’S GUIDE — 91
APPENDIX F — AREA/VOLUME FORMULAS
AREA FORMULAS
USER’S GUIDE — 93
SURFACE AREA/VOLUME FORMULAS
94 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
REPAIR AND RETURN
WARRANTY, REPAIR AND RETURN INFORMATION
Return Guidelines
1. Please read the Warranty in this User's Guide to determine if
your Calculated Industries product remains under warranty
before calling or returning any device for evaluation or repairs.
2. If your product won't turn on, check the batteries as outlined in
the User's Guide.
3. If you need more assistance, please go to the website listed
below.
4. If you believe you need to return your product, please call a
Calculated Industries representative between the hours of
8:00am to 4:00pm Pacific Time for additional information and a
Return Merchandise Authorization (RMA).
Call Toll Free: 1-800-854-8075
Outside USA: 1-775-885-4900
www.calculated.com/warranty
USER’S GUIDE — 95
WARRANTY
Warranty Repair Service – U.S.A.
Calculated Industries (“CI”) warrants this product against defects in materials and workmanship for a period of one (1) year from the date of original
consumer purchase in the U.S. If a defect exists during the warranty period, CI at its option will either repair (using new or remanufactured parts) or
replace (with a new or remanufactured calculator) the product at no charge.
THE WARRANTY WILL NOT APPLY TO THE PRODUCT IF IT HAS BEEN
DAMAGED BY MISUSE, ALTERATION, ACCIDENT, IMPROPER HANDLING
OR OPERATION, OR IF UNAUTHORIZED REPAIRS ARE ATTEMPTED
OR MADE. SOME EXAMPLES OF DAMAGES NOT COVERED BY WARRANTY INCLUDE, BUT ARE NOT LIMITED TO, BATTERY LEAKAGE,
BENDING, A BLACK “INK SPOT” OR VISIBLE CRACKING OF THE LCD,
WHICH ARE PRESUMED TO BE DAMAGES RESULTING FROM MISUSE
OR ABUSE.
To obtain warranty service in the U.S., please go to the website.
A repaired or replacement product assumes the remaining warranty of the
original product or 90 days, whichever is longer.
Non-Warranty Repair Service – U.S.A.
Non-warranty repair covers service beyond the warranty period, or service
requested due to damage resulting from misuse or abuse.
Contact Calculated Industries at the number listed above to obtain current
product repair information and charges. Repairs are guaranteed for 90 days.
Repair Service – Outside the U.S.A.
To obtain warranty or non-warranty repair service for goods purchased outside the U.S., contact the dealer through which you initially purchased the
product. If you cannot reasonably have the product repaired in your area,
you may contact CI to obtain current product repair information and charges,
including freight and duties.
96 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Disclaimer
CI MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS
OR IMPLIED, WITH RESPECT TO THE PRODUCT’S QUALITY, PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS PRODUCT, INCLUDING BUT NOT LIMITED
TO, KEYSTROKE PROCEDURES, MATHEMATICAL ACCURACY AND
PREPROGRAMMED MATERIAL, IS SOLD “AS IS,” AND YOU THE PURCHASER ASSUME THE ENTIRE RISK AS TO ITS QUALITY AND PERFORMANCE.
IN NO EVENT WILL CI BE LIABLE FOR DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY
DEFECT IN THE PRODUCT OR ITS DOCUMENTATION.
The warranty, disclaimer, and remedies set forth above are exclusive and
replace all others, oral or written, expressed or implied. No CI dealer, agent,
or employee is authorized to make any modification, extension, or addition
to this warranty.
Some states do not allow the exclusion or limitation of implied warranties or
liability for incidental or consequential damages, so the above limitation or
exclusion may not apply to you. This warranty gives you specific rights, and
you may also have other rights, which vary from state to state.
USER’S GUIDE — 97
INDEX
Accuracy/Errors, 91
Adding Linear Measurements, 29
Angle – Rise and Hypotenuse Known, 81
Angle and Diagonal (Hypotenuse), 59
Arc Caculations – Arc Length and Diameter Known, 40
Arc Length, 39
Arched Segment Walls, 41
Arched Windows, 41, 42
Area and Volume Keys (Not Available on Trig Model #4080), 4
Area Calculations, 31
Area, Rectangular, 31
Area, Square, 31
Area/Volume Formulas, 93
Auto Shut-Off, 91
Baluster Spacing, 77
Basic Math with Dimensions, 24
Basic Operation Keys, 1
Batteries, 92
Block/Brick Function, 6
Blocks, Number of, Based on Calculated Perimeter, 36
Blocks, Number of, Based on Entered Area, 35
Blocks, Number of, Based on Entered Length, 36
Blocks, Number of, Based on Entered Length and Height, 35
Board Feet – With Dollar Cost, 38
Board Feet, Number of, Based on Entered Volume, 38
Bricks (Face), Number of, 37
Bricks (Paver), Number of, 37
Center Point, Calculating, 30
Circular/Arc Function Keys, 7
Circumference and Area of a Circle, 39
Column/Cone Function, 8
Common Rafter Length, 58
Common Rafter Length – Pitch Unknown, 58
Compound Miter/Crown Moulding Example, 45
Compound Miter/Crown Moulding Keys, 8
Concrete (Driveway), Volume, 46
Concrete Columns, 47
Concrete Footings, 50
Concrete Volume, Complex, 48
Concrete/Paving, 46
Cone, Volume, 33
Construction Master, New Features, 90
Construction Project Keys and Functions, 6
Conversions, Area/Square, 23
Conversions, Linear, 22
Conversions, Volume/Cubic, 23
Conversions, Weight, 34
Conversions/Weight per Volume, 34
Convert Ç Key, 1
Convert Degree of Pitch, 57
Convert Percent Grade, 57
Converting Decimal Feet to Feet-Inch-Fractions, 22
Converting Decimal Inches to Fractional Inches, 23
Converting Degrees:Minutes:Seconds, 78
Converting Feet-Inch-Fractions to Decimal Feet, 22
Converting Fractional Inches to Decimal Inches, 23
USER’S GUIDE — 99
Converting Percent Grade to D:M:S, 80
Converting Roof Angle in Degrees to Pitch in Inches, 80
Converting Tangent/Pitch to Angle, 80
Cutting Boards, 29
Cylinder, Volume, 33
Default Settings, 82
Degrees:Minutes:Seconds, Converting, 78
Dimensional Measurement Unit Keys, 3
Dimensions (Linear), Entering, 18
Dimensions (Square/Cubic), Entering, 18
Dimensions, Adding, 24
Dimensions, Dividing, 24
Dimensions, Multiplying, 24
Dimensions, Subtracting, 24
Drywall, 52
Drywall Function (Not Available on Trig Model #4080), 9
Drywall Sheets, Number of (For a Given Area), 52
Drywall Sheets, Number of (For a Given Length), 52
Entering Dimensions, 18
Error Codes, 91
Examples, 29
Footing Function, 9
Grade/Slope, 53
Hip/Valley and Jack Rafter Keys, 11
Hip/Valley Rafter, 12
Irregular Pitch, 12
Irregular Side Jacks, 13
Irregular Hip/Valley and Jack Rafters, 62, 64
Jack Rafters, 12
Jack Rafters – Using Other Than 16 Inch, 61
Key definitions, 1
Lumber Estimation, 38
Memory and Storage Functions, 2
Memory Operation, 25
Multi-Function h Example, 32
Multi-Function W Example, 31
Paperless Tape Operation, 27
Percentage Calculations, 25
Pitch Ratio, 57
Polygon, Example, 49
Polygon Function, 9
Preference Settings, Appendix B, 83
Preferences, How to Set, 86
Rake-Wall Function, 13
Rake-Wall – No Base, 66
Rake-Wall – With Base, 67
Recall ® Key, 3
Regular Hip/Valley and Jack Rafters, 60
Reset, 92
Right Triangle and Roof Framing, 54
Right Triangle/Roof Framing Keys, 10
Rise, 59
Rise and Diagonal, 59
Roof Covering – Entering Pitch, Length and Width, 68
Roof Covering – Entering Rise, Run (No Pitch) and Area, 69
Roof Framing Definitions, 55
Roof Materials/Covering Function, 14, 68
Setting Fractional Resolution, 20
Sheathing Cut, 60
100 — CONSTRUCTION MASTER ® PRO / TRIG / DESKTOP
Square Area, 31
Squaring-Up a Foundation, 51
Stair Key, 14
Stair Layout Definitions, 70
Stair Layout Examples, 70
Stairs – Given Only Floor-to-Floor Rise, 72
Stairs – Given Only the Run, 74
Stairs – Given Rise and Run, 75
Stairs – Given Rise and Run, Using “Riser Limited” Function for Code Restrictions, 76
Studs Function, 16
Studs, Number of, 78
Time Calculations Using D:M:S, 78
Trigonometric Keys (Trig #4080 and Desktop #44080 Models only), 16
Volume Calculations, 32
Volume, Concrete Columns , 47
Volume, Concrete (Complex), 48
Volume, Concrete (Driveway), 46
Volume, Cone, 33
Volume, Cylinder, 33
Volume, Rectangular Containers, 32
Warranty, 96
Warranty Repair Service, 96
Weight Keys, 5
Window Measurement, 30
4840 Hytech Drive
Carson City, NV 89706 U.S.A.
1-800-854-8075 • Fax: 1-775-885-4949
E-mail: info@calculated.com
www.calculated.com
USER’S GUIDE — 101
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